/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-Separate.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 13:41:12,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:41:12,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:41:12,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 13:41:12,258 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-Separate.epf [2021-06-05 13:41:12,278 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:41:12,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:41:12,278 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:41:12,278 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:41:12,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:41:12,279 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:41:12,280 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:41:12,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:41:12,280 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:41:12,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:41:12,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:41:12,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:41:12,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:41:12,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:41:12,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:41:12,281 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:41:12,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:41:12,281 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:41:12,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:41:12,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:41:12,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:41:12,282 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:41:12,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:41:12,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:41:12,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:41:12,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:41:12,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:41:12,283 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:41:12,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:41:12,283 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:41:12,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:41:12,283 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:41:12,283 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:41:12,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:41:12,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:41:12,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:41:12,586 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:41:12,589 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:41:12,590 INFO L432 ainManager$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 13:41:12,601 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 13:41:12,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:41:12,626 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:41:12,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:41:12,627 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:41:12,628 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:41:12,636 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 01:41:12" (1/1) ... [2021-06-05 13:41:12,643 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 01:41:12" (1/1) ... [2021-06-05 13:41:12,648 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:41:12,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:41:12,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:41:12,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:41:12,654 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 01:41:12" (1/1) ... [2021-06-05 13:41:12,654 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 01:41:12" (1/1) ... [2021-06-05 13:41:12,655 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 01:41:12" (1/1) ... [2021-06-05 13:41:12,655 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 01:41:12" (1/1) ... [2021-06-05 13:41:12,657 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 01:41:12" (1/1) ... [2021-06-05 13:41:12,659 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 01:41:12" (1/1) ... [2021-06-05 13:41:12,659 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 01:41:12" (1/1) ... [2021-06-05 13:41:12,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:41:12,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:41:12,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:41:12,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:41:12,665 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 01:41:12" (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 13:41:12,725 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 13:41:12,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 13:41:12,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 13:41:12,725 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 13:41:12,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 13:41:12,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 13:41:12,726 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:41:12,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:41:12,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:41:12,727 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 13:41:12,856 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:41:12,857 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 13:41:12,858 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:41:12 BoogieIcfgContainer [2021-06-05 13:41:12,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:41:12,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:41:12,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:41:12,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:41:12,862 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 01:41:12" (1/2) ... [2021-06-05 13:41:12,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f9e856 and model type array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:41:12, skipping insertion in model container [2021-06-05 13:41:12,863 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 01:41:12" (2/2) ... [2021-06-05 13:41:12,864 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.bpl [2021-06-05 13:41:12,869 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:41:12,869 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:41:12,869 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 13:41:12,870 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:41:12,896 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 13:41:12,913 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 13:41:12,927 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:41:12,927 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:41:12,927 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:41:12,927 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:41:12,927 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:41:12,927 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:41:12,928 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:41:12,928 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:41:12,935 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 66 flow [2021-06-05 13:41:12,946 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 13:41:12,948 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 13:41:12,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:41:12,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:12,963 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:12,963 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:12,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:12,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1540416471, now seen corresponding path program 1 times [2021-06-05 13:41:12,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:12,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822973496] [2021-06-05 13:41:12,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:13,101 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 13:41:13,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:13,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822973496] [2021-06-05 13:41:13,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822973496] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:13,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:41:13,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:41:13,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100930253] [2021-06-05 13:41:13,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:41:13,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:13,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:41:13,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:41:13,126 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 13:41:13,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:13,209 INFO L93 Difference]: Finished difference Result 102 states and 226 transitions. [2021-06-05 13:41:13,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:41:13,211 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 13:41:13,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:13,219 INFO L225 Difference]: With dead ends: 102 [2021-06-05 13:41:13,219 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 13:41:13,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:41:13,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 13:41:13,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2021-06-05 13:41:13,252 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 13:41:13,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 185 transitions. [2021-06-05 13:41:13,256 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 185 transitions. Word has length 11 [2021-06-05 13:41:13,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:13,256 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 185 transitions. [2021-06-05 13:41:13,256 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 13:41:13,256 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 185 transitions. [2021-06-05 13:41:13,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:41:13,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:13,258 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:13,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:41:13,258 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:13,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:13,259 INFO L82 PathProgramCache]: Analyzing trace with hash -214361416, now seen corresponding path program 1 times [2021-06-05 13:41:13,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:13,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703456953] [2021-06-05 13:41:13,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:13,327 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 13:41:13,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:13,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703456953] [2021-06-05 13:41:13,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703456953] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:13,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:41:13,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:41:13,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372230994] [2021-06-05 13:41:13,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:41:13,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:13,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:41:13,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:41:13,331 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 13:41:13,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:13,443 INFO L93 Difference]: Finished difference Result 160 states and 352 transitions. [2021-06-05 13:41:13,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:41:13,444 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 13:41:13,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:13,446 INFO L225 Difference]: With dead ends: 160 [2021-06-05 13:41:13,446 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 13:41:13,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:13,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 13:41:13,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 94. [2021-06-05 13:41:13,473 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 13:41:13,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 215 transitions. [2021-06-05 13:41:13,475 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 215 transitions. Word has length 14 [2021-06-05 13:41:13,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:13,475 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 215 transitions. [2021-06-05 13:41:13,475 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 13:41:13,475 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 215 transitions. [2021-06-05 13:41:13,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:41:13,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:13,477 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:13,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 13:41:13,477 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:13,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:13,478 INFO L82 PathProgramCache]: Analyzing trace with hash 110711837, now seen corresponding path program 1 times [2021-06-05 13:41:13,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:13,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079024001] [2021-06-05 13:41:13,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:13,513 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 13:41:13,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:13,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079024001] [2021-06-05 13:41:13,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079024001] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:13,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:41:13,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:41:13,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794558342] [2021-06-05 13:41:13,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:41:13,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:13,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:41:13,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:41:13,516 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 13:41:13,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:13,580 INFO L93 Difference]: Finished difference Result 171 states and 385 transitions. [2021-06-05 13:41:13,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:41:13,583 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 13:41:13,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:13,584 INFO L225 Difference]: With dead ends: 171 [2021-06-05 13:41:13,584 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 13:41:13,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:13,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 13:41:13,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 116. [2021-06-05 13:41:13,601 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 13:41:13,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 264 transitions. [2021-06-05 13:41:13,602 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 264 transitions. Word has length 14 [2021-06-05 13:41:13,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:13,602 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 264 transitions. [2021-06-05 13:41:13,602 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 13:41:13,602 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 264 transitions. [2021-06-05 13:41:13,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:41:13,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:13,603 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:13,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 13:41:13,604 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:13,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:13,604 INFO L82 PathProgramCache]: Analyzing trace with hash -632263843, now seen corresponding path program 2 times [2021-06-05 13:41:13,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:13,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852027119] [2021-06-05 13:41:13,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:13,678 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 13:41:13,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:13,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852027119] [2021-06-05 13:41:13,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852027119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:13,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643952862] [2021-06-05 13:41:13,679 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 13:41:13,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:13,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:13,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:41:13,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:13,826 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 13:41:13,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643952862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:13,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:13,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 13:41:13,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944183113] [2021-06-05 13:41:13,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:41:13,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:13,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:41:13,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:41:13,829 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 13:41:13,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:13,911 INFO L93 Difference]: Finished difference Result 141 states and 326 transitions. [2021-06-05 13:41:13,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:41:13,911 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 13:41:13,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:13,912 INFO L225 Difference]: With dead ends: 141 [2021-06-05 13:41:13,913 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 13:41:13,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:13,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 13:41:13,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 103. [2021-06-05 13:41:13,920 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 13:41:13,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 234 transitions. [2021-06-05 13:41:13,921 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 234 transitions. Word has length 14 [2021-06-05 13:41:13,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:13,921 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 234 transitions. [2021-06-05 13:41:13,921 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 13:41:13,921 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 234 transitions. [2021-06-05 13:41:13,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:41:13,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:13,922 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:14,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:14,137 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:14,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:14,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1209640048, now seen corresponding path program 2 times [2021-06-05 13:41:14,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:14,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707925381] [2021-06-05 13:41:14,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:14,223 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 13:41:14,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:14,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707925381] [2021-06-05 13:41:14,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707925381] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:14,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:41:14,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:41:14,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431368536] [2021-06-05 13:41:14,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:41:14,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:14,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:41:14,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:41:14,226 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 13:41:14,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:14,268 INFO L93 Difference]: Finished difference Result 144 states and 331 transitions. [2021-06-05 13:41:14,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:41:14,268 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 13:41:14,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:14,269 INFO L225 Difference]: With dead ends: 144 [2021-06-05 13:41:14,269 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 13:41:14,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:14,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 13:41:14,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 103. [2021-06-05 13:41:14,275 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 13:41:14,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2021-06-05 13:41:14,276 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 14 [2021-06-05 13:41:14,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:14,277 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2021-06-05 13:41:14,277 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 13:41:14,277 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2021-06-05 13:41:14,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:41:14,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:14,278 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 13:41:14,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 13:41:14,278 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:14,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:14,279 INFO L82 PathProgramCache]: Analyzing trace with hash -10930008, now seen corresponding path program 1 times [2021-06-05 13:41:14,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:14,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667920814] [2021-06-05 13:41:14,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:14,338 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 13:41:14,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:14,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667920814] [2021-06-05 13:41:14,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667920814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:14,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714652051] [2021-06-05 13:41:14,339 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 13:41:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:14,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:14,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:14,428 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 13:41:14,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714652051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:14,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:14,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-06-05 13:41:14,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021865110] [2021-06-05 13:41:14,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:14,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:14,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:14,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:14,430 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 13:41:14,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:14,500 INFO L93 Difference]: Finished difference Result 300 states and 674 transitions. [2021-06-05 13:41:14,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:41:14,501 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 13:41:14,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:14,502 INFO L225 Difference]: With dead ends: 300 [2021-06-05 13:41:14,503 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 13:41:14,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:14,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 13:41:14,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 143. [2021-06-05 13:41:14,510 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 13:41:14,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 334 transitions. [2021-06-05 13:41:14,511 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 334 transitions. Word has length 17 [2021-06-05 13:41:14,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:14,512 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 334 transitions. [2021-06-05 13:41:14,512 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 13:41:14,512 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 334 transitions. [2021-06-05 13:41:14,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:41:14,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:14,513 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 13:41:14,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:14,736 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:14,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:14,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1675583288, now seen corresponding path program 1 times [2021-06-05 13:41:14,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:14,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537671083] [2021-06-05 13:41:14,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:14,792 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 13:41:14,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:14,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537671083] [2021-06-05 13:41:14,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537671083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:14,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674880190] [2021-06-05 13:41:14,793 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 13:41:14,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:14,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:41:14,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:14,898 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 13:41:14,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674880190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:14,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:14,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-06-05 13:41:14,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560733433] [2021-06-05 13:41:14,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:14,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:14,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:14,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:14,900 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 13:41:14,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:14,948 INFO L93 Difference]: Finished difference Result 248 states and 569 transitions. [2021-06-05 13:41:14,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:41:14,949 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 13:41:14,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:14,950 INFO L225 Difference]: With dead ends: 248 [2021-06-05 13:41:14,950 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 13:41:14,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 13:41:14,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 194. [2021-06-05 13:41:14,958 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 13:41:14,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 468 transitions. [2021-06-05 13:41:14,959 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 468 transitions. Word has length 17 [2021-06-05 13:41:14,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:14,959 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 468 transitions. [2021-06-05 13:41:14,959 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 13:41:14,959 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 468 transitions. [2021-06-05 13:41:14,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:41:14,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:14,961 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 13:41:15,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:15,183 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:15,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:15,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1837184638, now seen corresponding path program 2 times [2021-06-05 13:41:15,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:15,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248771021] [2021-06-05 13:41:15,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:15,239 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 13:41:15,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:15,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248771021] [2021-06-05 13:41:15,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248771021] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:15,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:41:15,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:41:15,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585928649] [2021-06-05 13:41:15,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:41:15,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:15,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:41:15,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:41:15,241 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 13:41:15,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:15,280 INFO L93 Difference]: Finished difference Result 311 states and 725 transitions. [2021-06-05 13:41:15,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:41:15,280 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 13:41:15,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:15,283 INFO L225 Difference]: With dead ends: 311 [2021-06-05 13:41:15,283 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 13:41:15,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:41:15,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 13:41:15,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 252. [2021-06-05 13:41:15,293 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 13:41:15,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 620 transitions. [2021-06-05 13:41:15,294 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 620 transitions. Word has length 17 [2021-06-05 13:41:15,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:15,294 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 620 transitions. [2021-06-05 13:41:15,294 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 13:41:15,294 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 620 transitions. [2021-06-05 13:41:15,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:41:15,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:15,295 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 13:41:15,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 13:41:15,295 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:15,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:15,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1678798648, now seen corresponding path program 1 times [2021-06-05 13:41:15,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:15,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241624348] [2021-06-05 13:41:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:15,345 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 13:41:15,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:15,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241624348] [2021-06-05 13:41:15,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241624348] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:15,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:41:15,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:41:15,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45068819] [2021-06-05 13:41:15,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:41:15,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:15,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:41:15,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:41:15,352 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 13:41:15,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:15,386 INFO L93 Difference]: Finished difference Result 243 states and 574 transitions. [2021-06-05 13:41:15,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:41:15,386 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 13:41:15,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:15,387 INFO L225 Difference]: With dead ends: 243 [2021-06-05 13:41:15,389 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 13:41:15,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:41:15,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 13:41:15,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-06-05 13:41:15,395 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 13:41:15,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 497 transitions. [2021-06-05 13:41:15,397 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 497 transitions. Word has length 17 [2021-06-05 13:41:15,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:15,397 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 497 transitions. [2021-06-05 13:41:15,398 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 13:41:15,398 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 497 transitions. [2021-06-05 13:41:15,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:41:15,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:15,400 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 13:41:15,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 13:41:15,400 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:15,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:15,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1963262152, now seen corresponding path program 2 times [2021-06-05 13:41:15,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:15,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309630665] [2021-06-05 13:41:15,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:15,454 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 13:41:15,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:15,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309630665] [2021-06-05 13:41:15,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309630665] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:15,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:41:15,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:41:15,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585510943] [2021-06-05 13:41:15,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:41:15,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:15,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:41:15,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:15,456 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 13:41:15,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:15,489 INFO L93 Difference]: Finished difference Result 222 states and 527 transitions. [2021-06-05 13:41:15,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:41:15,489 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 13:41:15,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:15,490 INFO L225 Difference]: With dead ends: 222 [2021-06-05 13:41:15,490 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 13:41:15,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:15,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 13:41:15,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-06-05 13:41:15,495 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 13:41:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 527 transitions. [2021-06-05 13:41:15,496 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 527 transitions. Word has length 17 [2021-06-05 13:41:15,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:15,497 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 527 transitions. [2021-06-05 13:41:15,497 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 13:41:15,497 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 527 transitions. [2021-06-05 13:41:15,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:41:15,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:15,498 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 13:41:15,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 13:41:15,498 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:15,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:15,498 INFO L82 PathProgramCache]: Analyzing trace with hash 215291064, now seen corresponding path program 3 times [2021-06-05 13:41:15,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:15,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332854713] [2021-06-05 13:41:15,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:15,542 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 13:41:15,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:15,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332854713] [2021-06-05 13:41:15,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332854713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:15,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167055340] [2021-06-05 13:41:15,543 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 13:41:15,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:41:15,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:15,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:15,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:15,826 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 13:41:15,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167055340] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:15,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 13:41:15,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-06-05 13:41:15,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927633530] [2021-06-05 13:41:15,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:15,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:15,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:15,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:41:15,827 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 13:41:16,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:16,013 INFO L93 Difference]: Finished difference Result 421 states and 987 transitions. [2021-06-05 13:41:16,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:41:16,014 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 13:41:16,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:16,016 INFO L225 Difference]: With dead ends: 421 [2021-06-05 13:41:16,016 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 13:41:16,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:41:16,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 13:41:16,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 278. [2021-06-05 13:41:16,022 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 13:41:16,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-06-05 13:41:16,023 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 20 [2021-06-05 13:41:16,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:16,024 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-06-05 13:41:16,024 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 13:41:16,024 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-06-05 13:41:16,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:41:16,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:16,025 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 13:41:16,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:16,241 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:16,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:16,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2043788104, now seen corresponding path program 4 times [2021-06-05 13:41:16,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:16,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942918473] [2021-06-05 13:41:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:16,292 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 13:41:16,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:16,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942918473] [2021-06-05 13:41:16,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942918473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:16,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525338394] [2021-06-05 13:41:16,293 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 13:41:16,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:16,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:16,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:41:16,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:16,419 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 13:41:16,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525338394] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:16,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 13:41:16,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 8 [2021-06-05 13:41:16,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265250922] [2021-06-05 13:41:16,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:16,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:16,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:16,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:16,421 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 13:41:16,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:16,550 INFO L93 Difference]: Finished difference Result 592 states and 1376 transitions. [2021-06-05 13:41:16,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:41:16,550 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 13:41:16,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:16,553 INFO L225 Difference]: With dead ends: 592 [2021-06-05 13:41:16,553 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 13:41:16,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:16,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 13:41:16,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 376. [2021-06-05 13:41:16,563 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 13:41:16,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 953 transitions. [2021-06-05 13:41:16,564 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 953 transitions. Word has length 20 [2021-06-05 13:41:16,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:16,564 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 953 transitions. [2021-06-05 13:41:16,565 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 13:41:16,565 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 953 transitions. [2021-06-05 13:41:16,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:41:16,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:16,573 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 13:41:16,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 13:41:16,774 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:16,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:16,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1610963566, now seen corresponding path program 5 times [2021-06-05 13:41:16,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:16,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663976651] [2021-06-05 13:41:16,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:16,821 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 13:41:16,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:16,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663976651] [2021-06-05 13:41:16,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663976651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:16,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949235616] [2021-06-05 13:41:16,822 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 13:41:16,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:41:16,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:16,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:41:16,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:16,931 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 13:41:16,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949235616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:16,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:16,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-05 13:41:16,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294758820] [2021-06-05 13:41:16,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:16,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:16,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:16,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:16,934 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 13:41:17,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:17,058 INFO L93 Difference]: Finished difference Result 751 states and 1816 transitions. [2021-06-05 13:41:17,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:17,058 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 13:41:17,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:17,062 INFO L225 Difference]: With dead ends: 751 [2021-06-05 13:41:17,062 INFO L226 Difference]: Without dead ends: 751 [2021-06-05 13:41:17,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:17,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-06-05 13:41:17,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 527. [2021-06-05 13:41:17,077 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 13:41:17,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1399 transitions. [2021-06-05 13:41:17,080 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1399 transitions. Word has length 20 [2021-06-05 13:41:17,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:17,080 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1399 transitions. [2021-06-05 13:41:17,080 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 13:41:17,080 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1399 transitions. [2021-06-05 13:41:17,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:41:17,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:17,082 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 13:41:17,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:17,293 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:17,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:17,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1876435461, now seen corresponding path program 6 times [2021-06-05 13:41:17,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:17,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131288553] [2021-06-05 13:41:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:17,333 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 13:41:17,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:17,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131288553] [2021-06-05 13:41:17,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131288553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:17,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613275546] [2021-06-05 13:41:17,334 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 13:41:17,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:41:17,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:17,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:41:17,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:17,457 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 13:41:17,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613275546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:17,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:17,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-06-05 13:41:17,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120206288] [2021-06-05 13:41:17,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:17,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:17,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:17,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:17,459 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 13:41:17,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:17,547 INFO L93 Difference]: Finished difference Result 960 states and 2485 transitions. [2021-06-05 13:41:17,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:41:17,548 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 13:41:17,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:17,552 INFO L225 Difference]: With dead ends: 960 [2021-06-05 13:41:17,552 INFO L226 Difference]: Without dead ends: 956 [2021-06-05 13:41:17,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:17,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-06-05 13:41:17,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 785. [2021-06-05 13:41:17,576 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 13:41:17,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2158 transitions. [2021-06-05 13:41:17,579 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2158 transitions. Word has length 20 [2021-06-05 13:41:17,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:17,580 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2158 transitions. [2021-06-05 13:41:17,580 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 13:41:17,580 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2158 transitions. [2021-06-05 13:41:17,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:41:17,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:17,582 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 13:41:17,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:17,804 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:17,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:17,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1254555051, now seen corresponding path program 7 times [2021-06-05 13:41:17,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:17,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933743085] [2021-06-05 13:41:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:17,848 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 13:41:17,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:17,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933743085] [2021-06-05 13:41:17,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933743085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:17,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588912671] [2021-06-05 13:41:17,849 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 13:41:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:17,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:41:17,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:17,948 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 13:41:17,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588912671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:17,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:17,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-06-05 13:41:17,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117846427] [2021-06-05 13:41:17,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:17,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:17,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:17,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:17,950 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 13:41:18,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:18,064 INFO L93 Difference]: Finished difference Result 966 states and 2482 transitions. [2021-06-05 13:41:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:41:18,069 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 13:41:18,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:18,078 INFO L225 Difference]: With dead ends: 966 [2021-06-05 13:41:18,078 INFO L226 Difference]: Without dead ends: 966 [2021-06-05 13:41:18,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:18,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-06-05 13:41:18,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 785. [2021-06-05 13:41:18,108 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 13:41:18,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2148 transitions. [2021-06-05 13:41:18,111 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2148 transitions. Word has length 20 [2021-06-05 13:41:18,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:18,111 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2148 transitions. [2021-06-05 13:41:18,112 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 13:41:18,112 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2148 transitions. [2021-06-05 13:41:18,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:41:18,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:18,114 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 13:41:18,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 13:41:18,329 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:18,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:18,329 INFO L82 PathProgramCache]: Analyzing trace with hash 322738604, now seen corresponding path program 8 times [2021-06-05 13:41:18,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:18,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121196672] [2021-06-05 13:41:18,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:18,355 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 13:41:18,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:18,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121196672] [2021-06-05 13:41:18,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121196672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:18,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328110204] [2021-06-05 13:41:18,356 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 13:41:18,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:18,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:18,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:41:18,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:18,429 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 13:41:18,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328110204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:18,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:18,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 13:41:18,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313580955] [2021-06-05 13:41:18,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:41:18,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:18,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:41:18,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:18,430 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 13:41:18,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:18,510 INFO L93 Difference]: Finished difference Result 861 states and 2300 transitions. [2021-06-05 13:41:18,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:41:18,510 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 13:41:18,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:18,515 INFO L225 Difference]: With dead ends: 861 [2021-06-05 13:41:18,515 INFO L226 Difference]: Without dead ends: 858 [2021-06-05 13:41:18,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:18,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-06-05 13:41:18,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 781. [2021-06-05 13:41:18,532 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 13:41:18,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2133 transitions. [2021-06-05 13:41:18,535 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2133 transitions. Word has length 20 [2021-06-05 13:41:18,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:18,535 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2133 transitions. [2021-06-05 13:41:18,535 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 13:41:18,535 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2133 transitions. [2021-06-05 13:41:18,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:41:18,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:18,537 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 13:41:18,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:18,757 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:18,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:18,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1057166664, now seen corresponding path program 9 times [2021-06-05 13:41:18,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:18,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461099265] [2021-06-05 13:41:18,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:18,787 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 13:41:18,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:18,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461099265] [2021-06-05 13:41:18,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461099265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:18,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090620967] [2021-06-05 13:41:18,788 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 13:41:18,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:41:18,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:18,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:41:18,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:18,866 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 13:41:18,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090620967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:18,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:18,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 13:41:18,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375717335] [2021-06-05 13:41:18,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:41:18,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:18,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:41:18,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:18,868 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 13:41:18,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:18,954 INFO L93 Difference]: Finished difference Result 1114 states and 2914 transitions. [2021-06-05 13:41:18,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:41:18,955 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 13:41:18,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:18,959 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 13:41:18,960 INFO L226 Difference]: Without dead ends: 1114 [2021-06-05 13:41:18,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-05 13:41:18,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 899. [2021-06-05 13:41:18,986 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 13:41:18,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2489 transitions. [2021-06-05 13:41:18,989 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2489 transitions. Word has length 20 [2021-06-05 13:41:18,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:18,989 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2489 transitions. [2021-06-05 13:41:18,989 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 13:41:18,989 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2489 transitions. [2021-06-05 13:41:18,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:41:18,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:18,991 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 13:41:19,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 13:41:19,214 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:19,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:19,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1634542869, now seen corresponding path program 10 times [2021-06-05 13:41:19,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:19,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101816189] [2021-06-05 13:41:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:19,266 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 13:41:19,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:19,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101816189] [2021-06-05 13:41:19,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101816189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:19,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744425139] [2021-06-05 13:41:19,266 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 13:41:19,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:19,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:19,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:41:19,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:19,357 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 13:41:19,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744425139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:19,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:19,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-06-05 13:41:19,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876587993] [2021-06-05 13:41:19,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:19,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:19,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:19,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:19,359 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 13:41:19,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:19,453 INFO L93 Difference]: Finished difference Result 1380 states and 3776 transitions. [2021-06-05 13:41:19,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:41:19,453 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 13:41:19,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:19,458 INFO L225 Difference]: With dead ends: 1380 [2021-06-05 13:41:19,458 INFO L226 Difference]: Without dead ends: 1370 [2021-06-05 13:41:19,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:19,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-06-05 13:41:19,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1228. [2021-06-05 13:41:19,486 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 13:41:19,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3466 transitions. [2021-06-05 13:41:19,490 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3466 transitions. Word has length 20 [2021-06-05 13:41:19,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:19,490 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 3466 transitions. [2021-06-05 13:41:19,490 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 13:41:19,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3466 transitions. [2021-06-05 13:41:19,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:41:19,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:19,492 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 13:41:19,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 13:41:19,717 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:19,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:19,717 INFO L82 PathProgramCache]: Analyzing trace with hash 2038544017, now seen corresponding path program 11 times [2021-06-05 13:41:19,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:19,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797073922] [2021-06-05 13:41:19,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:19,749 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 13:41:19,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:19,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797073922] [2021-06-05 13:41:19,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797073922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:19,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422713563] [2021-06-05 13:41:19,750 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 13:41:19,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:41:19,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:19,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:41:19,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:19,834 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 13:41:19,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422713563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:19,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:19,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-06-05 13:41:19,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132440153] [2021-06-05 13:41:19,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:19,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:19,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:19,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:19,835 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 13:41:19,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:19,937 INFO L93 Difference]: Finished difference Result 1400 states and 3809 transitions. [2021-06-05 13:41:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:41:19,938 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 13:41:19,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:19,943 INFO L225 Difference]: With dead ends: 1400 [2021-06-05 13:41:19,944 INFO L226 Difference]: Without dead ends: 1400 [2021-06-05 13:41:19,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:19,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-06-05 13:41:19,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1248. [2021-06-05 13:41:19,969 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 13:41:19,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3510 transitions. [2021-06-05 13:41:19,973 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3510 transitions. Word has length 20 [2021-06-05 13:41:19,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:19,974 INFO L482 AbstractCegarLoop]: Abstraction has 1248 states and 3510 transitions. [2021-06-05 13:41:19,974 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 13:41:19,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3510 transitions. [2021-06-05 13:41:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:41:19,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:19,976 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 13:41:20,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 13:41:20,200 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:20,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:20,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1106727570, now seen corresponding path program 12 times [2021-06-05 13:41:20,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:20,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438186081] [2021-06-05 13:41:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:20,228 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 13:41:20,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:20,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438186081] [2021-06-05 13:41:20,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438186081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:20,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576026429] [2021-06-05 13:41:20,229 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 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 13:41:20,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 13:41:20,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:20,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:41:20,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:20,298 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 13:41:20,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576026429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:20,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:20,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 13:41:20,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712900973] [2021-06-05 13:41:20,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:41:20,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:20,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:41:20,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:20,300 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 13:41:20,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:20,358 INFO L93 Difference]: Finished difference Result 1485 states and 3980 transitions. [2021-06-05 13:41:20,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:41:20,359 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 13:41:20,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:20,364 INFO L225 Difference]: With dead ends: 1485 [2021-06-05 13:41:20,365 INFO L226 Difference]: Without dead ends: 1482 [2021-06-05 13:41:20,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:20,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-06-05 13:41:20,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1250. [2021-06-05 13:41:20,393 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 13:41:20,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 3508 transitions. [2021-06-05 13:41:20,396 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 3508 transitions. Word has length 20 [2021-06-05 13:41:20,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:20,397 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 3508 transitions. [2021-06-05 13:41:20,397 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 13:41:20,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 3508 transitions. [2021-06-05 13:41:20,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:41:20,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:20,399 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 13:41:20,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:20,616 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:20,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:20,617 INFO L82 PathProgramCache]: Analyzing trace with hash 400971561, now seen corresponding path program 13 times [2021-06-05 13:41:20,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:20,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034353201] [2021-06-05 13:41:20,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:20,669 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 13:41:20,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:20,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034353201] [2021-06-05 13:41:20,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034353201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:20,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892321631] [2021-06-05 13:41:20,669 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 13:41:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:20,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:41:20,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:20,760 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 13:41:20,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892321631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:20,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:20,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-05 13:41:20,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895581706] [2021-06-05 13:41:20,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:20,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:20,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:20,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:20,763 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 13:41:20,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:20,875 INFO L93 Difference]: Finished difference Result 1426 states and 3852 transitions. [2021-06-05 13:41:20,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:20,875 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 13:41:20,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:20,881 INFO L225 Difference]: With dead ends: 1426 [2021-06-05 13:41:20,881 INFO L226 Difference]: Without dead ends: 1426 [2021-06-05 13:41:20,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:20,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-06-05 13:41:20,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1193. [2021-06-05 13:41:20,909 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 13:41:20,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 3338 transitions. [2021-06-05 13:41:20,912 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 3338 transitions. Word has length 20 [2021-06-05 13:41:20,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:20,912 INFO L482 AbstractCegarLoop]: Abstraction has 1193 states and 3338 transitions. [2021-06-05 13:41:20,912 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 13:41:20,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 3338 transitions. [2021-06-05 13:41:20,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:41:20,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:20,916 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 13:41:21,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:21,139 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:21,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:21,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1313790136, now seen corresponding path program 14 times [2021-06-05 13:41:21,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:21,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677508098] [2021-06-05 13:41:21,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:21,177 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 13:41:21,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:21,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677508098] [2021-06-05 13:41:21,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677508098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:21,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671085684] [2021-06-05 13:41:21,178 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 13:41:21,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:21,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:21,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:41:21,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:21,269 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 13:41:21,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671085684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:21,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:21,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 13:41:21,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387978598] [2021-06-05 13:41:21,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:21,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:21,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:21,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:21,270 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 13:41:21,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:21,344 INFO L93 Difference]: Finished difference Result 1396 states and 3748 transitions. [2021-06-05 13:41:21,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:41:21,345 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 13:41:21,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:21,350 INFO L225 Difference]: With dead ends: 1396 [2021-06-05 13:41:21,350 INFO L226 Difference]: Without dead ends: 1382 [2021-06-05 13:41:21,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:21,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2021-06-05 13:41:21,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1217. [2021-06-05 13:41:21,373 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 13:41:21,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 3378 transitions. [2021-06-05 13:41:21,375 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 3378 transitions. Word has length 20 [2021-06-05 13:41:21,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:21,376 INFO L482 AbstractCegarLoop]: Abstraction has 1217 states and 3378 transitions. [2021-06-05 13:41:21,376 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 13:41:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 3378 transitions. [2021-06-05 13:41:21,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:41:21,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:21,378 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 13:41:21,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 13:41:21,600 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:21,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:21,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1149983723, now seen corresponding path program 1 times [2021-06-05 13:41:21,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:21,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163092891] [2021-06-05 13:41:21,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:21,649 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 13:41:21,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:21,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163092891] [2021-06-05 13:41:21,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163092891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:21,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089211687] [2021-06-05 13:41:21,649 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 13:41:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:21,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:21,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:21,759 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 13:41:21,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089211687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:21,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:21,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 13:41:21,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578660129] [2021-06-05 13:41:21,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:41:21,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:21,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:41:21,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:41:21,760 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 13:41:22,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:22,140 INFO L93 Difference]: Finished difference Result 1620 states and 4189 transitions. [2021-06-05 13:41:22,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:41:22,140 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 13:41:22,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:22,146 INFO L225 Difference]: With dead ends: 1620 [2021-06-05 13:41:22,147 INFO L226 Difference]: Without dead ends: 1620 [2021-06-05 13:41:22,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 203.6ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:41:22,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-06-05 13:41:22,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1363. [2021-06-05 13:41:22,176 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 13:41:22,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3665 transitions. [2021-06-05 13:41:22,179 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3665 transitions. Word has length 23 [2021-06-05 13:41:22,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:22,179 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 3665 transitions. [2021-06-05 13:41:22,179 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 13:41:22,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3665 transitions. [2021-06-05 13:41:22,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:41:22,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:22,181 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 13:41:22,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:22,397 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:22,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:22,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1870263307, now seen corresponding path program 15 times [2021-06-05 13:41:22,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:22,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169754267] [2021-06-05 13:41:22,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:22,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:22,450 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 13:41:22,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:22,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169754267] [2021-06-05 13:41:22,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169754267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:22,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172099236] [2021-06-05 13:41:22,450 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 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 13:41:22,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:41:22,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:22,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:22,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:22,535 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 13:41:22,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172099236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:22,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:22,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 13:41:22,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944234974] [2021-06-05 13:41:22,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:41:22,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:22,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:41:22,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:22,537 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 13:41:22,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:22,618 INFO L93 Difference]: Finished difference Result 1903 states and 5027 transitions. [2021-06-05 13:41:22,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:41:22,619 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 13:41:22,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:22,639 INFO L225 Difference]: With dead ends: 1903 [2021-06-05 13:41:22,639 INFO L226 Difference]: Without dead ends: 1896 [2021-06-05 13:41:22,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:22,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-06-05 13:41:22,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1797. [2021-06-05 13:41:22,675 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 13:41:22,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 4837 transitions. [2021-06-05 13:41:22,679 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 4837 transitions. Word has length 23 [2021-06-05 13:41:22,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:22,680 INFO L482 AbstractCegarLoop]: Abstraction has 1797 states and 4837 transitions. [2021-06-05 13:41:22,680 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 13:41:22,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 4837 transitions. [2021-06-05 13:41:22,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:41:22,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:22,682 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 13:41:22,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 13:41:22,901 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:22,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:22,901 INFO L82 PathProgramCache]: Analyzing trace with hash -877014541, now seen corresponding path program 16 times [2021-06-05 13:41:22,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:22,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990347555] [2021-06-05 13:41:22,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:22,941 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 13:41:22,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:22,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990347555] [2021-06-05 13:41:22,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990347555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:22,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764510495] [2021-06-05 13:41:22,941 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) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:22,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:22,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:22,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:22,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:23,021 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 13:41:23,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764510495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:23,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:23,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 13:41:23,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360116948] [2021-06-05 13:41:23,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:41:23,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:23,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:41:23,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:23,022 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 13:41:23,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:23,096 INFO L93 Difference]: Finished difference Result 2099 states and 5565 transitions. [2021-06-05 13:41:23,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:41:23,097 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 13:41:23,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:23,101 INFO L225 Difference]: With dead ends: 2099 [2021-06-05 13:41:23,101 INFO L226 Difference]: Without dead ends: 2092 [2021-06-05 13:41:23,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:23,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-06-05 13:41:23,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1863. [2021-06-05 13:41:23,139 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 13:41:23,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 5029 transitions. [2021-06-05 13:41:23,144 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 5029 transitions. Word has length 23 [2021-06-05 13:41:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:23,145 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 5029 transitions. [2021-06-05 13:41:23,145 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 13:41:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 5029 transitions. [2021-06-05 13:41:23,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:41:23,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:23,148 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 13:41:23,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 13:41:23,371 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:23,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:23,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1516662741, now seen corresponding path program 1 times [2021-06-05 13:41:23,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:23,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855080352] [2021-06-05 13:41:23,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:23,431 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 13:41:23,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:23,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855080352] [2021-06-05 13:41:23,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855080352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:23,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588936012] [2021-06-05 13:41:23,431 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) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:23,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:23,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:23,527 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 13:41:23,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588936012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:23,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:23,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 13:41:23,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177328519] [2021-06-05 13:41:23,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:23,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:23,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:23,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:23,528 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 13:41:23,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:23,704 INFO L93 Difference]: Finished difference Result 1530 states and 4049 transitions. [2021-06-05 13:41:23,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:41:23,704 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 13:41:23,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:23,707 INFO L225 Difference]: With dead ends: 1530 [2021-06-05 13:41:23,707 INFO L226 Difference]: Without dead ends: 1391 [2021-06-05 13:41:23,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:41:23,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-06-05 13:41:23,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1357. [2021-06-05 13:41:23,729 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 13:41:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 3676 transitions. [2021-06-05 13:41:23,732 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 3676 transitions. Word has length 23 [2021-06-05 13:41:23,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:23,732 INFO L482 AbstractCegarLoop]: Abstraction has 1357 states and 3676 transitions. [2021-06-05 13:41:23,732 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 13:41:23,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 3676 transitions. [2021-06-05 13:41:23,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:41:23,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:23,734 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 13:41:23,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 13:41:23,958 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:23,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:23,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2072587809, now seen corresponding path program 2 times [2021-06-05 13:41:23,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:23,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930497319] [2021-06-05 13:41:23,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:24,012 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 13:41:24,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:24,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930497319] [2021-06-05 13:41:24,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930497319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:24,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052790452] [2021-06-05 13:41:24,012 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 13:41:24,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:24,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:24,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:24,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:24,111 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 13:41:24,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052790452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:24,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:24,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 13:41:24,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746885468] [2021-06-05 13:41:24,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:24,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:24,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:24,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:24,114 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 13:41:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:24,295 INFO L93 Difference]: Finished difference Result 1538 states and 4021 transitions. [2021-06-05 13:41:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:41:24,295 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 13:41:24,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:24,298 INFO L225 Difference]: With dead ends: 1538 [2021-06-05 13:41:24,298 INFO L226 Difference]: Without dead ends: 1538 [2021-06-05 13:41:24,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:41:24,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-06-05 13:41:24,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1383. [2021-06-05 13:41:24,326 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 13:41:24,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 3736 transitions. [2021-06-05 13:41:24,329 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 3736 transitions. Word has length 23 [2021-06-05 13:41:24,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:24,330 INFO L482 AbstractCegarLoop]: Abstraction has 1383 states and 3736 transitions. [2021-06-05 13:41:24,330 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 13:41:24,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 3736 transitions. [2021-06-05 13:41:24,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:41:24,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:24,332 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 13:41:24,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 13:41:24,555 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:24,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:24,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1575503784, now seen corresponding path program 2 times [2021-06-05 13:41:24,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:24,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823677803] [2021-06-05 13:41:24,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:24,599 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 13:41:24,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:24,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823677803] [2021-06-05 13:41:24,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823677803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:24,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031369862] [2021-06-05 13:41:24,600 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 13:41:24,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:24,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:24,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:41:24,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:24,685 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 13:41:24,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031369862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:24,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:24,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 13:41:24,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652820006] [2021-06-05 13:41:24,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:41:24,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:24,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:41:24,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:24,686 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 13:41:24,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:24,782 INFO L93 Difference]: Finished difference Result 1546 states and 4028 transitions. [2021-06-05 13:41:24,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:41:24,783 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 13:41:24,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:24,786 INFO L225 Difference]: With dead ends: 1546 [2021-06-05 13:41:24,786 INFO L226 Difference]: Without dead ends: 1526 [2021-06-05 13:41:24,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:24,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-06-05 13:41:24,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1395. [2021-06-05 13:41:24,806 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 13:41:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 3748 transitions. [2021-06-05 13:41:24,809 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 3748 transitions. Word has length 23 [2021-06-05 13:41:24,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:24,809 INFO L482 AbstractCegarLoop]: Abstraction has 1395 states and 3748 transitions. [2021-06-05 13:41:24,809 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 13:41:24,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 3748 transitions. [2021-06-05 13:41:24,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:41:24,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:24,811 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 13:41:25,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:25,025 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:25,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:25,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1556804075, now seen corresponding path program 3 times [2021-06-05 13:41:25,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:25,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95521627] [2021-06-05 13:41:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:25,087 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 13:41:25,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:25,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95521627] [2021-06-05 13:41:25,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95521627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:25,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727456051] [2021-06-05 13:41:25,088 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 13:41:25,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:41:25,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:25,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:25,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:25,212 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 13:41:25,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727456051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:25,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:25,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 13:41:25,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577353200] [2021-06-05 13:41:25,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:25,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:25,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:25,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:25,214 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 13:41:25,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:25,429 INFO L93 Difference]: Finished difference Result 1913 states and 4928 transitions. [2021-06-05 13:41:25,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:41:25,429 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 13:41:25,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:25,433 INFO L225 Difference]: With dead ends: 1913 [2021-06-05 13:41:25,433 INFO L226 Difference]: Without dead ends: 1913 [2021-06-05 13:41:25,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:41:25,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-06-05 13:41:25,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1544. [2021-06-05 13:41:25,460 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 13:41:25,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 4139 transitions. [2021-06-05 13:41:25,463 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 4139 transitions. Word has length 23 [2021-06-05 13:41:25,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:25,464 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 4139 transitions. [2021-06-05 13:41:25,464 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 13:41:25,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 4139 transitions. [2021-06-05 13:41:25,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:41:25,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:25,466 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 13:41:25,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:25,681 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:25,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:25,681 INFO L82 PathProgramCache]: Analyzing trace with hash -56471083, now seen corresponding path program 3 times [2021-06-05 13:41:25,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:25,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083948994] [2021-06-05 13:41:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:25,730 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 13:41:25,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:25,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083948994] [2021-06-05 13:41:25,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083948994] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:25,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:41:25,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:41:25,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183008420] [2021-06-05 13:41:25,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:41:25,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:25,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:41:25,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:25,731 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 13:41:25,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:25,783 INFO L93 Difference]: Finished difference Result 1492 states and 3879 transitions. [2021-06-05 13:41:25,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:41:25,784 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 13:41:25,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:25,786 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 13:41:25,787 INFO L226 Difference]: Without dead ends: 1411 [2021-06-05 13:41:25,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:25,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-06-05 13:41:25,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1381. [2021-06-05 13:41:25,807 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 13:41:25,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 3620 transitions. [2021-06-05 13:41:25,810 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 3620 transitions. Word has length 23 [2021-06-05 13:41:25,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:25,810 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 3620 transitions. [2021-06-05 13:41:25,810 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 13:41:25,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 3620 transitions. [2021-06-05 13:41:25,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:41:25,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:25,812 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 13:41:25,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-06-05 13:41:25,812 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:25,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:25,812 INFO L82 PathProgramCache]: Analyzing trace with hash -670007263, now seen corresponding path program 4 times [2021-06-05 13:41:25,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:25,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939150266] [2021-06-05 13:41:25,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:25,876 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 13:41:25,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:25,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939150266] [2021-06-05 13:41:25,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939150266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:25,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450670538] [2021-06-05 13:41:25,877 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 13:41:25,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:25,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:25,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:25,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:25,970 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 13:41:25,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450670538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:25,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:25,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 13:41:25,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409583614] [2021-06-05 13:41:25,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:25,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:25,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:25,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:25,971 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 13:41:26,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:26,184 INFO L93 Difference]: Finished difference Result 1624 states and 4116 transitions. [2021-06-05 13:41:26,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:41:26,185 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 13:41:26,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:26,187 INFO L225 Difference]: With dead ends: 1624 [2021-06-05 13:41:26,187 INFO L226 Difference]: Without dead ends: 1612 [2021-06-05 13:41:26,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:41:26,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-06-05 13:41:26,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1413. [2021-06-05 13:41:26,207 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 13:41:26,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3700 transitions. [2021-06-05 13:41:26,210 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3700 transitions. Word has length 23 [2021-06-05 13:41:26,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:26,210 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 3700 transitions. [2021-06-05 13:41:26,210 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 13:41:26,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3700 transitions. [2021-06-05 13:41:26,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:41:26,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:26,214 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 13:41:26,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 13:41:26,436 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:26,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:26,437 INFO L82 PathProgramCache]: Analyzing trace with hash -819089257, now seen corresponding path program 17 times [2021-06-05 13:41:26,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:26,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310785491] [2021-06-05 13:41:26,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:26,471 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 13:41:26,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:26,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310785491] [2021-06-05 13:41:26,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310785491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:26,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981872699] [2021-06-05 13:41:26,471 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 13:41:26,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:41:26,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:26,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:26,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:26,652 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 13:41:26,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981872699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:26,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:26,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 11 [2021-06-05 13:41:26,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851950883] [2021-06-05 13:41:26,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:41:26,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:26,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:41:26,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:41:26,653 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 13:41:27,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:27,133 INFO L93 Difference]: Finished difference Result 2940 states and 7390 transitions. [2021-06-05 13:41:27,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:41:27,133 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 13:41:27,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:27,139 INFO L225 Difference]: With dead ends: 2940 [2021-06-05 13:41:27,139 INFO L226 Difference]: Without dead ends: 2926 [2021-06-05 13:41:27,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 282.8ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:41:27,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-06-05 13:41:27,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 1583. [2021-06-05 13:41:27,171 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 13:41:27,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 4142 transitions. [2021-06-05 13:41:27,174 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 4142 transitions. Word has length 23 [2021-06-05 13:41:27,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:27,174 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 4142 transitions. [2021-06-05 13:41:27,174 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 13:41:27,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 4142 transitions. [2021-06-05 13:41:27,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:41:27,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:27,177 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 13:41:27,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:27,393 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:27,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:27,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1471910071, now seen corresponding path program 5 times [2021-06-05 13:41:27,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:27,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384830224] [2021-06-05 13:41:27,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:27,435 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 13:41:27,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:27,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384830224] [2021-06-05 13:41:27,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384830224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:27,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576260279] [2021-06-05 13:41:27,435 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 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 13:41:27,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:41:27,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:27,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:27,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:27,541 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 13:41:27,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576260279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:27,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:27,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 13:41:27,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822819647] [2021-06-05 13:41:27,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:41:27,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:27,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:41:27,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:41:27,542 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 13:41:27,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:27,825 INFO L93 Difference]: Finished difference Result 1758 states and 4409 transitions. [2021-06-05 13:41:27,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:41:27,825 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 13:41:27,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:27,829 INFO L225 Difference]: With dead ends: 1758 [2021-06-05 13:41:27,829 INFO L226 Difference]: Without dead ends: 1746 [2021-06-05 13:41:27,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:41:27,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-06-05 13:41:27,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1437. [2021-06-05 13:41:27,849 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 13:41:27,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 3730 transitions. [2021-06-05 13:41:27,852 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 3730 transitions. Word has length 23 [2021-06-05 13:41:27,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:27,852 INFO L482 AbstractCegarLoop]: Abstraction has 1437 states and 3730 transitions. [2021-06-05 13:41:27,852 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 13:41:27,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 3730 transitions. [2021-06-05 13:41:27,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:41:27,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:27,854 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 13:41:28,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-05 13:41:28,067 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:28,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:28,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1618050889, now seen corresponding path program 4 times [2021-06-05 13:41:28,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:28,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895225550] [2021-06-05 13:41:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:28,149 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 13:41:28,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:28,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895225550] [2021-06-05 13:41:28,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895225550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:28,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508770501] [2021-06-05 13:41:28,150 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 13:41:28,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:28,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:28,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:28,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:28,253 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 13:41:28,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508770501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:28,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:28,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 13:41:28,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340349493] [2021-06-05 13:41:28,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:28,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:28,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:28,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:28,255 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 13:41:28,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:28,410 INFO L93 Difference]: Finished difference Result 1432 states and 3672 transitions. [2021-06-05 13:41:28,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:41:28,411 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 13:41:28,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:28,413 INFO L225 Difference]: With dead ends: 1432 [2021-06-05 13:41:28,413 INFO L226 Difference]: Without dead ends: 1365 [2021-06-05 13:41:28,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:41:28,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-06-05 13:41:28,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1356. [2021-06-05 13:41:28,433 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 13:41:28,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 3533 transitions. [2021-06-05 13:41:28,436 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 3533 transitions. Word has length 23 [2021-06-05 13:41:28,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:28,436 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 3533 transitions. [2021-06-05 13:41:28,436 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 13:41:28,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 3533 transitions. [2021-06-05 13:41:28,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:28,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:28,438 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 13:41:28,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:28,661 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:28,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:28,662 INFO L82 PathProgramCache]: Analyzing trace with hash 2131794949, now seen corresponding path program 18 times [2021-06-05 13:41:28,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:28,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564740673] [2021-06-05 13:41:28,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:28,731 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 13:41:28,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:28,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564740673] [2021-06-05 13:41:28,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564740673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:28,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566165423] [2021-06-05 13:41:28,731 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 13:41:28,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:41:28,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:28,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:28,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:28,813 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 13:41:28,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566165423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:28,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:28,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 13:41:28,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500445207] [2021-06-05 13:41:28,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:41:28,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:28,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:41:28,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:28,815 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 13:41:28,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:28,961 INFO L93 Difference]: Finished difference Result 1715 states and 4244 transitions. [2021-06-05 13:41:28,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:41:28,962 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 13:41:28,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:28,964 INFO L225 Difference]: With dead ends: 1715 [2021-06-05 13:41:28,964 INFO L226 Difference]: Without dead ends: 1715 [2021-06-05 13:41:28,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:41:28,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-06-05 13:41:28,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1404. [2021-06-05 13:41:28,985 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 13:41:28,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 3666 transitions. [2021-06-05 13:41:28,988 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 3666 transitions. Word has length 26 [2021-06-05 13:41:28,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:28,988 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 3666 transitions. [2021-06-05 13:41:28,988 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 13:41:28,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 3666 transitions. [2021-06-05 13:41:28,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:28,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:28,991 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 13:41:29,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 13:41:29,205 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:29,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:29,205 INFO L82 PathProgramCache]: Analyzing trace with hash 761307032, now seen corresponding path program 19 times [2021-06-05 13:41:29,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:29,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563830589] [2021-06-05 13:41:29,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:29,245 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 13:41:29,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:29,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563830589] [2021-06-05 13:41:29,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563830589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:29,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021604477] [2021-06-05 13:41:29,246 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 13:41:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:29,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:29,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:29,334 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 13:41:29,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021604477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:29,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:29,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 13:41:29,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898575784] [2021-06-05 13:41:29,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:41:29,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:29,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:41:29,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:29,336 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 13:41:29,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:29,446 INFO L93 Difference]: Finished difference Result 2473 states and 6334 transitions. [2021-06-05 13:41:29,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:41:29,447 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 13:41:29,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:29,452 INFO L225 Difference]: With dead ends: 2473 [2021-06-05 13:41:29,452 INFO L226 Difference]: Without dead ends: 2455 [2021-06-05 13:41:29,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:29,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-06-05 13:41:29,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2018. [2021-06-05 13:41:29,487 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 13:41:29,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5462 transitions. [2021-06-05 13:41:29,491 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5462 transitions. Word has length 26 [2021-06-05 13:41:29,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:29,491 INFO L482 AbstractCegarLoop]: Abstraction has 2018 states and 5462 transitions. [2021-06-05 13:41:29,492 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 13:41:29,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5462 transitions. [2021-06-05 13:41:29,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:29,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:29,495 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 13:41:29,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:29,719 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:29,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:29,720 INFO L82 PathProgramCache]: Analyzing trace with hash -195885608, now seen corresponding path program 20 times [2021-06-05 13:41:29,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:29,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676597252] [2021-06-05 13:41:29,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:29,753 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 13:41:29,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:29,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676597252] [2021-06-05 13:41:29,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676597252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:29,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960885798] [2021-06-05 13:41:29,754 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 13:41:29,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:29,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:29,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:29,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:29,832 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 13:41:29,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960885798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:29,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:29,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-05 13:41:29,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112772021] [2021-06-05 13:41:29,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:29,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:29,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:29,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:29,833 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 13:41:29,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:29,968 INFO L93 Difference]: Finished difference Result 2447 states and 6260 transitions. [2021-06-05 13:41:29,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:41:29,968 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 13:41:29,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:29,971 INFO L225 Difference]: With dead ends: 2447 [2021-06-05 13:41:29,971 INFO L226 Difference]: Without dead ends: 2447 [2021-06-05 13:41:29,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:29,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-06-05 13:41:29,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1914. [2021-06-05 13:41:30,000 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 13:41:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 5147 transitions. [2021-06-05 13:41:30,004 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 5147 transitions. Word has length 26 [2021-06-05 13:41:30,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:30,005 INFO L482 AbstractCegarLoop]: Abstraction has 1914 states and 5147 transitions. [2021-06-05 13:41:30,005 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 13:41:30,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 5147 transitions. [2021-06-05 13:41:30,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:30,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:30,008 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 13:41:30,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 13:41:30,221 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:30,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:30,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1127702055, now seen corresponding path program 21 times [2021-06-05 13:41:30,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:30,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963676065] [2021-06-05 13:41:30,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:30,252 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 13:41:30,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:30,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963676065] [2021-06-05 13:41:30,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963676065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:30,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988038734] [2021-06-05 13:41:30,253 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 13:41:30,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:41:30,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:30,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:30,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:30,323 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 13:41:30,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988038734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:30,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:30,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 13:41:30,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533354738] [2021-06-05 13:41:30,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:30,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:30,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:30,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:30,324 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 13:41:30,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:30,398 INFO L93 Difference]: Finished difference Result 2092 states and 5497 transitions. [2021-06-05 13:41:30,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:41:30,399 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 13:41:30,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:30,401 INFO L225 Difference]: With dead ends: 2092 [2021-06-05 13:41:30,401 INFO L226 Difference]: Without dead ends: 2089 [2021-06-05 13:41:30,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:30,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-06-05 13:41:30,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1899. [2021-06-05 13:41:30,423 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 13:41:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 5096 transitions. [2021-06-05 13:41:30,427 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 5096 transitions. Word has length 26 [2021-06-05 13:41:30,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:30,427 INFO L482 AbstractCegarLoop]: Abstraction has 1899 states and 5096 transitions. [2021-06-05 13:41:30,427 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 13:41:30,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 5096 transitions. [2021-06-05 13:41:30,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:30,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:30,430 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 13:41:30,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:30,651 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:30,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:30,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1111998297, now seen corresponding path program 22 times [2021-06-05 13:41:30,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:30,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839768256] [2021-06-05 13:41:30,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:30,692 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 13:41:30,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:30,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839768256] [2021-06-05 13:41:30,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839768256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:30,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850515598] [2021-06-05 13:41:30,692 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 13:41:30,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:30,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:30,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:30,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:30,775 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 13:41:30,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850515598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:30,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:30,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 13:41:30,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797922959] [2021-06-05 13:41:30,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:30,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:30,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:30,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:30,777 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 13:41:30,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:30,884 INFO L93 Difference]: Finished difference Result 2552 states and 6599 transitions. [2021-06-05 13:41:30,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:30,884 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 13:41:30,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:30,887 INFO L225 Difference]: With dead ends: 2552 [2021-06-05 13:41:30,887 INFO L226 Difference]: Without dead ends: 2552 [2021-06-05 13:41:30,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:30,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-06-05 13:41:30,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2092. [2021-06-05 13:41:30,918 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 13:41:30,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 5674 transitions. [2021-06-05 13:41:30,924 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 5674 transitions. Word has length 26 [2021-06-05 13:41:30,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:30,925 INFO L482 AbstractCegarLoop]: Abstraction has 2092 states and 5674 transitions. [2021-06-05 13:41:30,925 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 13:41:30,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 5674 transitions. [2021-06-05 13:41:30,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:30,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:30,928 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 13:41:31,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 13:41:31,145 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:31,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:31,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1689374502, now seen corresponding path program 23 times [2021-06-05 13:41:31,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:31,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044202041] [2021-06-05 13:41:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:31,180 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 13:41:31,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:31,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044202041] [2021-06-05 13:41:31,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044202041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:31,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775953302] [2021-06-05 13:41:31,180 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 13:41:31,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:41:31,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:31,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:31,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:31,270 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 13:41:31,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775953302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:31,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:31,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2021-06-05 13:41:31,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914968906] [2021-06-05 13:41:31,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:41:31,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:31,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:41:31,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:31,270 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 13:41:31,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:31,367 INFO L93 Difference]: Finished difference Result 3728 states and 10027 transitions. [2021-06-05 13:41:31,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:31,368 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 13:41:31,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:31,371 INFO L225 Difference]: With dead ends: 3728 [2021-06-05 13:41:31,372 INFO L226 Difference]: Without dead ends: 3712 [2021-06-05 13:41:31,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:31,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3712 states. [2021-06-05 13:41:31,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3712 to 3201. [2021-06-05 13:41:31,457 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 13:41:31,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 9003 transitions. [2021-06-05 13:41:31,464 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 9003 transitions. Word has length 26 [2021-06-05 13:41:31,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:31,464 INFO L482 AbstractCegarLoop]: Abstraction has 3201 states and 9003 transitions. [2021-06-05 13:41:31,464 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 13:41:31,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 9003 transitions. [2021-06-05 13:41:31,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:31,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:31,468 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 13:41:31,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 13:41:31,681 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:31,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:31,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1983712384, now seen corresponding path program 24 times [2021-06-05 13:41:31,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:31,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268380561] [2021-06-05 13:41:31,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:31,713 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 13:41:31,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:31,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268380561] [2021-06-05 13:41:31,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268380561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:31,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102159837] [2021-06-05 13:41:31,713 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) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:31,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:41:31,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:31,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:31,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:31,800 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 13:41:31,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102159837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:31,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:31,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2021-06-05 13:41:31,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695430501] [2021-06-05 13:41:31,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:41:31,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:31,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:41:31,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:31,801 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 13:41:31,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:31,927 INFO L93 Difference]: Finished difference Result 3830 states and 10240 transitions. [2021-06-05 13:41:31,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:41:31,927 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 13:41:31,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:31,931 INFO L225 Difference]: With dead ends: 3830 [2021-06-05 13:41:31,931 INFO L226 Difference]: Without dead ends: 3830 [2021-06-05 13:41:31,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:41:31,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3830 states. [2021-06-05 13:41:31,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3830 to 3216. [2021-06-05 13:41:31,985 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 13:41:31,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 9021 transitions. [2021-06-05 13:41:31,993 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 9021 transitions. Word has length 26 [2021-06-05 13:41:31,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:31,993 INFO L482 AbstractCegarLoop]: Abstraction has 3216 states and 9021 transitions. [2021-06-05 13:41:31,993 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 13:41:31,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 9021 transitions. [2021-06-05 13:41:31,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:31,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:31,997 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 13:41:32,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:32,217 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:32,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:32,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1051895937, now seen corresponding path program 25 times [2021-06-05 13:41:32,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:32,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128874618] [2021-06-05 13:41:32,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:32,253 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 13:41:32,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:32,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128874618] [2021-06-05 13:41:32,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128874618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:32,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259286563] [2021-06-05 13:41:32,254 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 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 13:41:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:32,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:32,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:32,342 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 13:41:32,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259286563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:32,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:32,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 13:41:32,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535219522] [2021-06-05 13:41:32,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:32,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:32,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:32,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:32,344 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 13:41:32,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:32,447 INFO L93 Difference]: Finished difference Result 3629 states and 9839 transitions. [2021-06-05 13:41:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:41:32,447 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 13:41:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:32,451 INFO L225 Difference]: With dead ends: 3629 [2021-06-05 13:41:32,451 INFO L226 Difference]: Without dead ends: 3617 [2021-06-05 13:41:32,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:32,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3617 states. [2021-06-05 13:41:32,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3617 to 3079. [2021-06-05 13:41:32,488 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 13:41:32,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 8612 transitions. [2021-06-05 13:41:32,495 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 8612 transitions. Word has length 26 [2021-06-05 13:41:32,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:32,495 INFO L482 AbstractCegarLoop]: Abstraction has 3079 states and 8612 transitions. [2021-06-05 13:41:32,495 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 13:41:32,495 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 8612 transitions. [2021-06-05 13:41:32,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:32,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:32,499 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 13:41:32,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 13:41:32,721 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:32,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:32,722 INFO L82 PathProgramCache]: Analyzing trace with hash 346139928, now seen corresponding path program 26 times [2021-06-05 13:41:32,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:32,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083306471] [2021-06-05 13:41:32,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:32,768 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 13:41:32,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:32,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083306471] [2021-06-05 13:41:32,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083306471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:32,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70137092] [2021-06-05 13:41:32,769 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 13:41:32,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:32,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:32,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:32,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:32,895 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 13:41:32,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70137092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:32,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:32,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 13:41:32,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843166410] [2021-06-05 13:41:32,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:41:32,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:32,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:41:32,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:32,897 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 13:41:33,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:33,072 INFO L93 Difference]: Finished difference Result 4208 states and 11364 transitions. [2021-06-05 13:41:33,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:41:33,072 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 13:41:33,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:33,077 INFO L225 Difference]: With dead ends: 4208 [2021-06-05 13:41:33,077 INFO L226 Difference]: Without dead ends: 4208 [2021-06-05 13:41:33,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:41:33,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-06-05 13:41:33,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3506. [2021-06-05 13:41:33,123 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 13:41:33,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 9879 transitions. [2021-06-05 13:41:33,130 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 9879 transitions. Word has length 26 [2021-06-05 13:41:33,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:33,130 INFO L482 AbstractCegarLoop]: Abstraction has 3506 states and 9879 transitions. [2021-06-05 13:41:33,130 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 13:41:33,130 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 9879 transitions. [2021-06-05 13:41:33,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:33,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:33,134 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 13:41:33,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:33,349 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:33,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:33,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1258958503, now seen corresponding path program 27 times [2021-06-05 13:41:33,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:33,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258349668] [2021-06-05 13:41:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:33,399 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 13:41:33,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:33,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258349668] [2021-06-05 13:41:33,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258349668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:33,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453752910] [2021-06-05 13:41:33,400 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 13:41:33,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:41:33,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:33,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:33,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:33,476 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 13:41:33,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453752910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:33,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:33,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 13:41:33,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951339191] [2021-06-05 13:41:33,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:33,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:33,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:33,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:33,477 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 13:41:33,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:33,593 INFO L93 Difference]: Finished difference Result 3876 states and 10634 transitions. [2021-06-05 13:41:33,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:41:33,594 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 13:41:33,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:33,599 INFO L225 Difference]: With dead ends: 3876 [2021-06-05 13:41:33,599 INFO L226 Difference]: Without dead ends: 3864 [2021-06-05 13:41:33,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:33,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2021-06-05 13:41:33,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3527. [2021-06-05 13:41:33,654 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 13:41:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3527 states to 3527 states and 9913 transitions. [2021-06-05 13:41:33,661 INFO L78 Accepts]: Start accepts. Automaton has 3527 states and 9913 transitions. Word has length 26 [2021-06-05 13:41:33,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:33,662 INFO L482 AbstractCegarLoop]: Abstraction has 3527 states and 9913 transitions. [2021-06-05 13:41:33,662 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 13:41:33,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3527 states and 9913 transitions. [2021-06-05 13:41:33,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:33,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:33,666 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 13:41:33,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 13:41:33,877 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:33,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:33,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1264613717, now seen corresponding path program 28 times [2021-06-05 13:41:33,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:33,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076469195] [2021-06-05 13:41:33,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:33,923 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 13:41:33,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:33,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076469195] [2021-06-05 13:41:33,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076469195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:33,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258356141] [2021-06-05 13:41:33,923 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 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 13:41:33,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:33,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:33,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:41:33,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:34,049 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 13:41:34,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258356141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:34,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:34,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 13:41:34,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620326998] [2021-06-05 13:41:34,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:34,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:34,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:34,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:34,050 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 13:41:34,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:34,253 INFO L93 Difference]: Finished difference Result 4288 states and 11605 transitions. [2021-06-05 13:41:34,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:41:34,253 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 13:41:34,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:34,258 INFO L225 Difference]: With dead ends: 4288 [2021-06-05 13:41:34,258 INFO L226 Difference]: Without dead ends: 4288 [2021-06-05 13:41:34,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:41:34,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4288 states. [2021-06-05 13:41:34,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4288 to 3636. [2021-06-05 13:41:34,328 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 13:41:34,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 10243 transitions. [2021-06-05 13:41:34,335 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 10243 transitions. Word has length 26 [2021-06-05 13:41:34,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:34,335 INFO L482 AbstractCegarLoop]: Abstraction has 3636 states and 10243 transitions. [2021-06-05 13:41:34,335 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 13:41:34,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 10243 transitions. [2021-06-05 13:41:34,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:34,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:34,339 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 13:41:34,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 13:41:34,559 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:34,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:34,560 INFO L82 PathProgramCache]: Analyzing trace with hash -535116392, now seen corresponding path program 29 times [2021-06-05 13:41:34,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:34,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133510382] [2021-06-05 13:41:34,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:34,597 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 13:41:34,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:34,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133510382] [2021-06-05 13:41:34,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133510382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:34,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910796261] [2021-06-05 13:41:34,597 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 13:41:34,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:41:34,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:34,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:34,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:34,676 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 13:41:34,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910796261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:34,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:34,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-06-05 13:41:34,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767547648] [2021-06-05 13:41:34,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:41:34,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:34,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:41:34,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:34,677 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 13:41:34,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:34,814 INFO L93 Difference]: Finished difference Result 4890 states and 13623 transitions. [2021-06-05 13:41:34,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:41:34,814 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 13:41:34,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:34,819 INFO L225 Difference]: With dead ends: 4890 [2021-06-05 13:41:34,819 INFO L226 Difference]: Without dead ends: 4858 [2021-06-05 13:41:34,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:41:34,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2021-06-05 13:41:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 4449. [2021-06-05 13:41:34,878 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 13:41:34,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4449 states to 4449 states and 12643 transitions. [2021-06-05 13:41:34,887 INFO L78 Accepts]: Start accepts. Automaton has 4449 states and 12643 transitions. Word has length 26 [2021-06-05 13:41:34,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:34,888 INFO L482 AbstractCegarLoop]: Abstraction has 4449 states and 12643 transitions. [2021-06-05 13:41:34,888 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 13:41:34,888 INFO L276 IsEmpty]: Start isEmpty. Operand 4449 states and 12643 transitions. [2021-06-05 13:41:34,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:34,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:34,891 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 13:41:35,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:35,114 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:35,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:35,115 INFO L82 PathProgramCache]: Analyzing trace with hash -2036715645, now seen corresponding path program 30 times [2021-06-05 13:41:35,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:35,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110085061] [2021-06-05 13:41:35,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:35,150 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 13:41:35,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:35,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110085061] [2021-06-05 13:41:35,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110085061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:35,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142844607] [2021-06-05 13:41:35,151 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 13:41:35,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:41:35,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:35,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:35,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:35,252 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 13:41:35,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142844607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:35,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:35,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 13:41:35,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466585548] [2021-06-05 13:41:35,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:35,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:35,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:35,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:35,253 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 13:41:35,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:35,347 INFO L93 Difference]: Finished difference Result 5697 states and 15817 transitions. [2021-06-05 13:41:35,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:35,347 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 13:41:35,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:35,354 INFO L225 Difference]: With dead ends: 5697 [2021-06-05 13:41:35,354 INFO L226 Difference]: Without dead ends: 5697 [2021-06-05 13:41:35,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:35,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5697 states. [2021-06-05 13:41:35,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5697 to 5030. [2021-06-05 13:41:35,411 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 13:41:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 14412 transitions. [2021-06-05 13:41:35,423 INFO L78 Accepts]: Start accepts. Automaton has 5030 states and 14412 transitions. Word has length 26 [2021-06-05 13:41:35,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:35,423 INFO L482 AbstractCegarLoop]: Abstraction has 5030 states and 14412 transitions. [2021-06-05 13:41:35,423 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 13:41:35,423 INFO L276 IsEmpty]: Start isEmpty. Operand 5030 states and 14412 transitions. [2021-06-05 13:41:35,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:35,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:35,427 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 13:41:35,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:35,637 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:35,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:35,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1680875446, now seen corresponding path program 31 times [2021-06-05 13:41:35,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:35,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125994445] [2021-06-05 13:41:35,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:35,707 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 13:41:35,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:35,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125994445] [2021-06-05 13:41:35,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125994445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:35,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694385778] [2021-06-05 13:41:35,707 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 13:41:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:35,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:35,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:35,782 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 13:41:35,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694385778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:35,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:35,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-05 13:41:35,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772899667] [2021-06-05 13:41:35,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:35,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:35,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:35,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:35,784 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 13:41:35,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:35,894 INFO L93 Difference]: Finished difference Result 6176 states and 17476 transitions. [2021-06-05 13:41:35,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:35,895 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 13:41:35,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:35,902 INFO L225 Difference]: With dead ends: 6176 [2021-06-05 13:41:35,902 INFO L226 Difference]: Without dead ends: 6160 [2021-06-05 13:41:35,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:35,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6160 states. [2021-06-05 13:41:35,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6160 to 5779. [2021-06-05 13:41:35,959 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 13:41:35,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5779 states to 5779 states and 16650 transitions. [2021-06-05 13:41:35,972 INFO L78 Accepts]: Start accepts. Automaton has 5779 states and 16650 transitions. Word has length 26 [2021-06-05 13:41:35,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:35,972 INFO L482 AbstractCegarLoop]: Abstraction has 5779 states and 16650 transitions. [2021-06-05 13:41:35,972 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 13:41:35,972 INFO L276 IsEmpty]: Start isEmpty. Operand 5779 states and 16650 transitions. [2021-06-05 13:41:35,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:35,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:35,976 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 13:41:36,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:36,197 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:36,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:36,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1058995036, now seen corresponding path program 32 times [2021-06-05 13:41:36,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:36,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822810025] [2021-06-05 13:41:36,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:36,228 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 13:41:36,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:36,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822810025] [2021-06-05 13:41:36,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822810025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:36,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276205506] [2021-06-05 13:41:36,228 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 13:41:36,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:36,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:36,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:36,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:36,299 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 13:41:36,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276205506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:36,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:36,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-05 13:41:36,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922894123] [2021-06-05 13:41:36,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:36,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:36,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:36,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:36,300 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 13:41:36,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:36,435 INFO L93 Difference]: Finished difference Result 6311 states and 17791 transitions. [2021-06-05 13:41:36,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:41:36,436 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 13:41:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:36,446 INFO L225 Difference]: With dead ends: 6311 [2021-06-05 13:41:36,446 INFO L226 Difference]: Without dead ends: 6311 [2021-06-05 13:41:36,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:36,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-06-05 13:41:36,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 5796. [2021-06-05 13:41:36,530 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 13:41:36,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5796 states to 5796 states and 16694 transitions. [2021-06-05 13:41:36,543 INFO L78 Accepts]: Start accepts. Automaton has 5796 states and 16694 transitions. Word has length 26 [2021-06-05 13:41:36,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:36,544 INFO L482 AbstractCegarLoop]: Abstraction has 5796 states and 16694 transitions. [2021-06-05 13:41:36,544 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 13:41:36,544 INFO L276 IsEmpty]: Start isEmpty. Operand 5796 states and 16694 transitions. [2021-06-05 13:41:36,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:36,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:36,548 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 13:41:36,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 13:41:36,769 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:36,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:36,769 INFO L82 PathProgramCache]: Analyzing trace with hash 127178589, now seen corresponding path program 33 times [2021-06-05 13:41:36,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:36,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639614080] [2021-06-05 13:41:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:36,802 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 13:41:36,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:36,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639614080] [2021-06-05 13:41:36,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639614080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:36,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699865845] [2021-06-05 13:41:36,803 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 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 13:41:36,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:41:36,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:36,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:36,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:36,902 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 13:41:36,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699865845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:36,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:36,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 13:41:36,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220617192] [2021-06-05 13:41:36,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:36,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:36,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:36,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:36,903 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 13:41:36,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:36,980 INFO L93 Difference]: Finished difference Result 6492 states and 18169 transitions. [2021-06-05 13:41:36,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:41:36,980 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 13:41:36,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:36,988 INFO L225 Difference]: With dead ends: 6492 [2021-06-05 13:41:36,988 INFO L226 Difference]: Without dead ends: 6489 [2021-06-05 13:41:36,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6489 states. [2021-06-05 13:41:37,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6489 to 5795. [2021-06-05 13:41:37,077 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 13:41:37,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5795 states to 5795 states and 16684 transitions. [2021-06-05 13:41:37,087 INFO L78 Accepts]: Start accepts. Automaton has 5795 states and 16684 transitions. Word has length 26 [2021-06-05 13:41:37,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:37,087 INFO L482 AbstractCegarLoop]: Abstraction has 5795 states and 16684 transitions. [2021-06-05 13:41:37,087 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 13:41:37,087 INFO L276 IsEmpty]: Start isEmpty. Operand 5795 states and 16684 transitions. [2021-06-05 13:41:37,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:37,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:37,090 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 13:41:37,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:37,293 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:37,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:37,293 INFO L82 PathProgramCache]: Analyzing trace with hash -578577420, now seen corresponding path program 34 times [2021-06-05 13:41:37,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:37,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334356842] [2021-06-05 13:41:37,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:37,329 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 13:41:37,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:37,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334356842] [2021-06-05 13:41:37,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334356842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:37,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276694607] [2021-06-05 13:41:37,330 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) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:37,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:37,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:37,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:37,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:37,419 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 13:41:37,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276694607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:37,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:37,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 13:41:37,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370263056] [2021-06-05 13:41:37,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:41:37,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:37,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:41:37,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:37,421 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 13:41:37,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:37,605 INFO L93 Difference]: Finished difference Result 6497 states and 18243 transitions. [2021-06-05 13:41:37,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:41:37,606 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 13:41:37,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:37,615 INFO L225 Difference]: With dead ends: 6497 [2021-06-05 13:41:37,615 INFO L226 Difference]: Without dead ends: 6497 [2021-06-05 13:41:37,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:41:37,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6497 states. [2021-06-05 13:41:37,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6497 to 5692. [2021-06-05 13:41:37,671 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 13:41:37,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 16338 transitions. [2021-06-05 13:41:37,681 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 16338 transitions. Word has length 26 [2021-06-05 13:41:37,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:37,681 INFO L482 AbstractCegarLoop]: Abstraction has 5692 states and 16338 transitions. [2021-06-05 13:41:37,681 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 13:41:37,681 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 16338 transitions. [2021-06-05 13:41:37,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:37,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:37,686 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 13:41:37,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:37,887 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:37,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:37,887 INFO L82 PathProgramCache]: Analyzing trace with hash 334241155, now seen corresponding path program 35 times [2021-06-05 13:41:37,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:37,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614917988] [2021-06-05 13:41:37,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:37,923 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 13:41:37,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:37,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614917988] [2021-06-05 13:41:37,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614917988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:37,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056108457] [2021-06-05 13:41:37,924 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 13:41:37,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:41:37,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:37,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:37,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:38,050 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 13:41:38,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056108457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:38,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:38,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-06-05 13:41:38,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400727447] [2021-06-05 13:41:38,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:41:38,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:38,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:41:38,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:38,052 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 13:41:38,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:38,178 INFO L93 Difference]: Finished difference Result 8010 states and 22671 transitions. [2021-06-05 13:41:38,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:38,178 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 13:41:38,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:38,187 INFO L225 Difference]: With dead ends: 8010 [2021-06-05 13:41:38,187 INFO L226 Difference]: Without dead ends: 7995 [2021-06-05 13:41:38,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:41:38,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-06-05 13:41:38,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 7490. [2021-06-05 13:41:38,310 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 13:41:38,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7490 states to 7490 states and 21658 transitions. [2021-06-05 13:41:38,322 INFO L78 Accepts]: Start accepts. Automaton has 7490 states and 21658 transitions. Word has length 26 [2021-06-05 13:41:38,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:38,322 INFO L482 AbstractCegarLoop]: Abstraction has 7490 states and 21658 transitions. [2021-06-05 13:41:38,322 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 13:41:38,322 INFO L276 IsEmpty]: Start isEmpty. Operand 7490 states and 21658 transitions. [2021-06-05 13:41:38,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:38,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:38,326 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 13:41:38,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-06-05 13:41:38,526 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:38,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:38,527 INFO L82 PathProgramCache]: Analyzing trace with hash -232684456, now seen corresponding path program 36 times [2021-06-05 13:41:38,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:38,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46786504] [2021-06-05 13:41:38,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:38,571 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 13:41:38,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:38,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46786504] [2021-06-05 13:41:38,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46786504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:38,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433097835] [2021-06-05 13:41:38,572 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 13:41:38,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:41:38,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:38,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:38,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:38,665 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 13:41:38,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433097835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:38,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:38,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 13:41:38,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742731386] [2021-06-05 13:41:38,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:41:38,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:38,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:41:38,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:41:38,666 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 13:41:38,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:38,926 INFO L93 Difference]: Finished difference Result 8305 states and 23489 transitions. [2021-06-05 13:41:38,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:41:38,926 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 13:41:38,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:38,937 INFO L225 Difference]: With dead ends: 8305 [2021-06-05 13:41:38,938 INFO L226 Difference]: Without dead ends: 8305 [2021-06-05 13:41:38,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:41:38,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8305 states. [2021-06-05 13:41:39,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8305 to 5349. [2021-06-05 13:41:39,018 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 13:41:39,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5349 states to 5349 states and 15316 transitions. [2021-06-05 13:41:39,025 INFO L78 Accepts]: Start accepts. Automaton has 5349 states and 15316 transitions. Word has length 26 [2021-06-05 13:41:39,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:39,026 INFO L482 AbstractCegarLoop]: Abstraction has 5349 states and 15316 transitions. [2021-06-05 13:41:39,026 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 13:41:39,026 INFO L276 IsEmpty]: Start isEmpty. Operand 5349 states and 15316 transitions. [2021-06-05 13:41:39,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:39,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:39,029 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 13:41:39,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:39,230 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:39,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:39,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1947181405, now seen corresponding path program 37 times [2021-06-05 13:41:39,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:39,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233340704] [2021-06-05 13:41:39,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:39,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:39,329 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 13:41:39,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:39,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233340704] [2021-06-05 13:41:39,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233340704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:39,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639400563] [2021-06-05 13:41:39,329 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 13:41:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:39,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:41:39,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:39,409 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 13:41:39,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639400563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:39,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:39,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 13:41:39,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565858875] [2021-06-05 13:41:39,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:41:39,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:39,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:41:39,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:39,411 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 13:41:39,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:39,546 INFO L93 Difference]: Finished difference Result 5938 states and 16533 transitions. [2021-06-05 13:41:39,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:41:39,547 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 13:41:39,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:39,555 INFO L225 Difference]: With dead ends: 5938 [2021-06-05 13:41:39,555 INFO L226 Difference]: Without dead ends: 5915 [2021-06-05 13:41:39,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:41:39,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2021-06-05 13:41:39,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 5382. [2021-06-05 13:41:39,637 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 13:41:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5382 states to 5382 states and 15379 transitions. [2021-06-05 13:41:39,648 INFO L78 Accepts]: Start accepts. Automaton has 5382 states and 15379 transitions. Word has length 26 [2021-06-05 13:41:39,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:39,649 INFO L482 AbstractCegarLoop]: Abstraction has 5382 states and 15379 transitions. [2021-06-05 13:41:39,649 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 13:41:39,649 INFO L276 IsEmpty]: Start isEmpty. Operand 5382 states and 15379 transitions. [2021-06-05 13:41:39,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:39,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:39,656 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 13:41:39,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 13:41:39,879 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:39,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:39,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1692037720, now seen corresponding path program 5 times [2021-06-05 13:41:39,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:39,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764412225] [2021-06-05 13:41:39,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:39,937 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 13:41:39,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:39,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764412225] [2021-06-05 13:41:39,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764412225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:39,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418402508] [2021-06-05 13:41:39,937 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) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:39,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:41:39,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:39,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:41:39,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:40,040 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 13:41:40,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418402508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:40,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:40,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:41:40,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853100572] [2021-06-05 13:41:40,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:41:40,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:40,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:41:40,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:40,042 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 13:41:40,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:40,288 INFO L93 Difference]: Finished difference Result 5894 states and 16303 transitions. [2021-06-05 13:41:40,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:41:40,288 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 13:41:40,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:40,298 INFO L225 Difference]: With dead ends: 5894 [2021-06-05 13:41:40,298 INFO L226 Difference]: Without dead ends: 5890 [2021-06-05 13:41:40,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:41:40,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5890 states. [2021-06-05 13:41:40,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5890 to 5478. [2021-06-05 13:41:40,363 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 13:41:40,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 15466 transitions. [2021-06-05 13:41:40,373 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 15466 transitions. Word has length 29 [2021-06-05 13:41:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:40,373 INFO L482 AbstractCegarLoop]: Abstraction has 5478 states and 15466 transitions. [2021-06-05 13:41:40,373 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 13:41:40,373 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 15466 transitions. [2021-06-05 13:41:40,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:40,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:40,378 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 13:41:40,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:40,578 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:40,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:40,579 INFO L82 PathProgramCache]: Analyzing trace with hash 2081641864, now seen corresponding path program 38 times [2021-06-05 13:41:40,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:40,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212718303] [2021-06-05 13:41:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:40,622 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 13:41:40,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:40,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212718303] [2021-06-05 13:41:40,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212718303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:40,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663593290] [2021-06-05 13:41:40,622 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 13:41:40,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:40,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:40,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:41:40,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:40,708 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 13:41:40,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663593290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:40,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:40,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 13:41:40,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873074876] [2021-06-05 13:41:40,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:40,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:40,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:40,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:40,709 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 13:41:40,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:40,843 INFO L93 Difference]: Finished difference Result 6571 states and 18236 transitions. [2021-06-05 13:41:40,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:41:40,844 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 13:41:40,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:40,851 INFO L225 Difference]: With dead ends: 6571 [2021-06-05 13:41:40,851 INFO L226 Difference]: Without dead ends: 6564 [2021-06-05 13:41:40,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:40,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6564 states. [2021-06-05 13:41:40,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6564 to 6354. [2021-06-05 13:41:40,924 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 13:41:40,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6354 states to 6354 states and 17841 transitions. [2021-06-05 13:41:40,934 INFO L78 Accepts]: Start accepts. Automaton has 6354 states and 17841 transitions. Word has length 29 [2021-06-05 13:41:40,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:40,934 INFO L482 AbstractCegarLoop]: Abstraction has 6354 states and 17841 transitions. [2021-06-05 13:41:40,934 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 13:41:40,934 INFO L276 IsEmpty]: Start isEmpty. Operand 6354 states and 17841 transitions. [2021-06-05 13:41:40,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:40,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:40,938 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 13:41:41,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:41,139 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:41,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:41,139 INFO L82 PathProgramCache]: Analyzing trace with hash -159779870, now seen corresponding path program 39 times [2021-06-05 13:41:41,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:41,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916747864] [2021-06-05 13:41:41,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:41,186 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 13:41:41,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:41,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916747864] [2021-06-05 13:41:41,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916747864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:41,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512819164] [2021-06-05 13:41:41,186 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 13:41:41,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:41:41,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:41,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:41,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:41,361 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 13:41:41,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512819164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:41,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:41,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2021-06-05 13:41:41,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742411355] [2021-06-05 13:41:41,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:41:41,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:41,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:41:41,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:41:41,362 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 13:41:42,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:42,098 INFO L93 Difference]: Finished difference Result 14438 states and 39075 transitions. [2021-06-05 13:41:42,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:41:42,099 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 13:41:42,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:42,119 INFO L225 Difference]: With dead ends: 14438 [2021-06-05 13:41:42,119 INFO L226 Difference]: Without dead ends: 14355 [2021-06-05 13:41:42,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 415.8ms TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:41:42,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14355 states. [2021-06-05 13:41:42,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14355 to 8796. [2021-06-05 13:41:42,298 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 13:41:42,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8796 states to 8796 states and 25178 transitions. [2021-06-05 13:41:42,312 INFO L78 Accepts]: Start accepts. Automaton has 8796 states and 25178 transitions. Word has length 29 [2021-06-05 13:41:42,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:42,313 INFO L482 AbstractCegarLoop]: Abstraction has 8796 states and 25178 transitions. [2021-06-05 13:41:42,313 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 13:41:42,313 INFO L276 IsEmpty]: Start isEmpty. Operand 8796 states and 25178 transitions. [2021-06-05 13:41:42,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:42,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:42,318 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 13:41:42,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:42,519 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:42,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:42,519 INFO L82 PathProgramCache]: Analyzing trace with hash 328852904, now seen corresponding path program 6 times [2021-06-05 13:41:42,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:42,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86764756] [2021-06-05 13:41:42,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:42,585 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 13:41:42,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:42,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86764756] [2021-06-05 13:41:42,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86764756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:42,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081086574] [2021-06-05 13:41:42,585 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 13:41:42,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:41:42,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:42,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:41:42,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:42,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 13:41:42,776 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 13:41:42,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:41:42,779 INFO L628 ElimStorePlain]: treesize reduction 14, result has 6.7 percent of original size [2021-06-05 13:41:42,780 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 13:41:42,780 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 13:41:42,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2021-06-05 13:41:42,787 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 13:41:42,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081086574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:42,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:42,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 13:41:42,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730897200] [2021-06-05 13:41:42,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:41:42,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:42,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:41:42,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:41:42,788 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 13:41:43,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:43,053 INFO L93 Difference]: Finished difference Result 6002 states and 16256 transitions. [2021-06-05 13:41:43,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:43,053 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 13:41:43,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:43,061 INFO L225 Difference]: With dead ends: 6002 [2021-06-05 13:41:43,061 INFO L226 Difference]: Without dead ends: 5857 [2021-06-05 13:41:43,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:41:43,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5857 states. [2021-06-05 13:41:43,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5857 to 3330. [2021-06-05 13:41:43,107 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 13:41:43,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 9315 transitions. [2021-06-05 13:41:43,113 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 9315 transitions. Word has length 29 [2021-06-05 13:41:43,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:43,113 INFO L482 AbstractCegarLoop]: Abstraction has 3330 states and 9315 transitions. [2021-06-05 13:41:43,113 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 13:41:43,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 9315 transitions. [2021-06-05 13:41:43,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:43,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:43,116 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 13:41:43,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:43,316 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:43,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:43,317 INFO L82 PathProgramCache]: Analyzing trace with hash -114875864, now seen corresponding path program 7 times [2021-06-05 13:41:43,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:43,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182249005] [2021-06-05 13:41:43,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:43,375 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 13:41:43,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:43,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182249005] [2021-06-05 13:41:43,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182249005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:43,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136608084] [2021-06-05 13:41:43,375 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 13:41:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:43,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:41:43,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:43,455 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 13:41:43,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136608084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:43,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:43,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:41:43,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302547740] [2021-06-05 13:41:43,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:43,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:43,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:43,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:43,457 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 13:41:43,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:43,565 INFO L93 Difference]: Finished difference Result 3434 states and 9538 transitions. [2021-06-05 13:41:43,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:43,566 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 13:41:43,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:43,569 INFO L225 Difference]: With dead ends: 3434 [2021-06-05 13:41:43,569 INFO L226 Difference]: Without dead ends: 3434 [2021-06-05 13:41:43,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:43,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2021-06-05 13:41:43,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 3356. [2021-06-05 13:41:43,609 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 13:41:43,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 9376 transitions. [2021-06-05 13:41:43,615 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 9376 transitions. Word has length 29 [2021-06-05 13:41:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:43,615 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 9376 transitions. [2021-06-05 13:41:43,615 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 13:41:43,615 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 9376 transitions. [2021-06-05 13:41:43,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:43,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:43,617 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 13:41:43,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 13:41:43,818 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:43,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:43,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1336556998, now seen corresponding path program 6 times [2021-06-05 13:41:43,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:43,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862174950] [2021-06-05 13:41:43,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:43,882 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 13:41:43,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:43,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862174950] [2021-06-05 13:41:43,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862174950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:43,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774234626] [2021-06-05 13:41:43,883 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 13:41:43,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:41:43,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:43,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:41:43,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:43,983 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 13:41:43,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774234626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:43,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:43,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:41:43,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769723627] [2021-06-05 13:41:43,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:43,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:43,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:43,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:43,985 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 13:41:44,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:44,135 INFO L93 Difference]: Finished difference Result 3792 states and 10255 transitions. [2021-06-05 13:41:44,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:44,135 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 13:41:44,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:44,141 INFO L225 Difference]: With dead ends: 3792 [2021-06-05 13:41:44,141 INFO L226 Difference]: Without dead ends: 3777 [2021-06-05 13:41:44,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:44,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2021-06-05 13:41:44,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3443. [2021-06-05 13:41:44,187 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 13:41:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 9568 transitions. [2021-06-05 13:41:44,194 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 9568 transitions. Word has length 29 [2021-06-05 13:41:44,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:44,195 INFO L482 AbstractCegarLoop]: Abstraction has 3443 states and 9568 transitions. [2021-06-05 13:41:44,195 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 13:41:44,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 9568 transitions. [2021-06-05 13:41:44,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:44,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:44,198 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 13:41:44,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 13:41:44,422 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:44,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:44,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1458077306, now seen corresponding path program 8 times [2021-06-05 13:41:44,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:44,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207222177] [2021-06-05 13:41:44,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:44,473 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 13:41:44,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:44,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207222177] [2021-06-05 13:41:44,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207222177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:44,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796353525] [2021-06-05 13:41:44,473 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 13:41:44,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:44,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:44,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:41:44,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:44,576 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 13:41:44,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796353525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:44,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:44,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 13:41:44,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526277021] [2021-06-05 13:41:44,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:44,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:44,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:44,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:44,577 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 13:41:44,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:44,777 INFO L93 Difference]: Finished difference Result 3707 states and 10003 transitions. [2021-06-05 13:41:44,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:44,778 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 13:41:44,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:44,783 INFO L225 Difference]: With dead ends: 3707 [2021-06-05 13:41:44,783 INFO L226 Difference]: Without dead ends: 3623 [2021-06-05 13:41:44,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:44,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2021-06-05 13:41:44,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 3361. [2021-06-05 13:41:44,820 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 13:41:44,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 9276 transitions. [2021-06-05 13:41:44,825 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 9276 transitions. Word has length 29 [2021-06-05 13:41:44,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:44,825 INFO L482 AbstractCegarLoop]: Abstraction has 3361 states and 9276 transitions. [2021-06-05 13:41:44,825 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 13:41:44,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 9276 transitions. [2021-06-05 13:41:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:44,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:44,827 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 13:41:45,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 13:41:45,028 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:45,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:45,028 INFO L82 PathProgramCache]: Analyzing trace with hash -2071613486, now seen corresponding path program 9 times [2021-06-05 13:41:45,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:45,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221788622] [2021-06-05 13:41:45,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:45,082 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 13:41:45,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:45,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221788622] [2021-06-05 13:41:45,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221788622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:45,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646458730] [2021-06-05 13:41:45,083 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 13:41:45,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:41:45,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:45,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:41:45,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:45,166 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 13:41:45,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646458730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:45,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:45,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:41:45,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061619119] [2021-06-05 13:41:45,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:45,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:45,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:45,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:45,167 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 13:41:45,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:45,307 INFO L93 Difference]: Finished difference Result 3919 states and 10560 transitions. [2021-06-05 13:41:45,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:45,307 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 13:41:45,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:45,314 INFO L225 Difference]: With dead ends: 3919 [2021-06-05 13:41:45,314 INFO L226 Difference]: Without dead ends: 3907 [2021-06-05 13:41:45,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:45,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-06-05 13:41:45,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3641. [2021-06-05 13:41:45,375 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 13:41:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 9995 transitions. [2021-06-05 13:41:45,383 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 9995 transitions. Word has length 29 [2021-06-05 13:41:45,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:45,383 INFO L482 AbstractCegarLoop]: Abstraction has 3641 states and 9995 transitions. [2021-06-05 13:41:45,383 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 13:41:45,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 9995 transitions. [2021-06-05 13:41:45,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:45,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:45,389 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 13:41:45,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 13:41:45,611 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:45,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:45,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1048811592, now seen corresponding path program 40 times [2021-06-05 13:41:45,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:45,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397091325] [2021-06-05 13:41:45,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:45,650 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 13:41:45,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:45,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397091325] [2021-06-05 13:41:45,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397091325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:45,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611796354] [2021-06-05 13:41:45,651 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 13:41:45,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:45,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:45,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:41:45,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:45,755 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 13:41:45,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611796354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:45,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:45,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 13:41:45,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486448638] [2021-06-05 13:41:45,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:45,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:45,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:45,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:45,756 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 13:41:45,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:45,881 INFO L93 Difference]: Finished difference Result 4879 states and 13397 transitions. [2021-06-05 13:41:45,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:41:45,881 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 13:41:45,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:45,887 INFO L225 Difference]: With dead ends: 4879 [2021-06-05 13:41:45,887 INFO L226 Difference]: Without dead ends: 4866 [2021-06-05 13:41:45,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:45,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-06-05 13:41:45,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 4554. [2021-06-05 13:41:45,950 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 13:41:45,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 12740 transitions. [2021-06-05 13:41:45,960 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 12740 transitions. Word has length 29 [2021-06-05 13:41:45,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:45,960 INFO L482 AbstractCegarLoop]: Abstraction has 4554 states and 12740 transitions. [2021-06-05 13:41:45,960 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 13:41:45,960 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 12740 transitions. [2021-06-05 13:41:45,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:45,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:45,964 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 13:41:46,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 13:41:46,179 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:46,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:46,180 INFO L82 PathProgramCache]: Analyzing trace with hash 70303848, now seen corresponding path program 10 times [2021-06-05 13:41:46,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:46,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772857681] [2021-06-05 13:41:46,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:46,232 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 13:41:46,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:46,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772857681] [2021-06-05 13:41:46,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772857681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:46,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593647730] [2021-06-05 13:41:46,233 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 13:41:46,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:46,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:46,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:41:46,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:46,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 13:41:46,325 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 13:41:46,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:41:46,327 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 13:41:46,327 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 13:41:46,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:41:46,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 13:41:46,335 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 13:41:46,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593647730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:46,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:46,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 13:41:46,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673314888] [2021-06-05 13:41:46,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:46,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:46,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:46,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:46,336 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 13:41:46,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:46,628 INFO L93 Difference]: Finished difference Result 7716 states and 21017 transitions. [2021-06-05 13:41:46,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:41:46,628 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 13:41:46,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:46,639 INFO L225 Difference]: With dead ends: 7716 [2021-06-05 13:41:46,639 INFO L226 Difference]: Without dead ends: 7689 [2021-06-05 13:41:46,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:41:46,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7689 states. [2021-06-05 13:41:46,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7689 to 6612. [2021-06-05 13:41:46,749 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 13:41:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6612 states to 6612 states and 18577 transitions. [2021-06-05 13:41:46,765 INFO L78 Accepts]: Start accepts. Automaton has 6612 states and 18577 transitions. Word has length 29 [2021-06-05 13:41:46,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:46,765 INFO L482 AbstractCegarLoop]: Abstraction has 6612 states and 18577 transitions. [2021-06-05 13:41:46,765 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 13:41:46,765 INFO L276 IsEmpty]: Start isEmpty. Operand 6612 states and 18577 transitions. [2021-06-05 13:41:46,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:46,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:46,769 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 13:41:46,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 13:41:46,985 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:46,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:46,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1154021054, now seen corresponding path program 7 times [2021-06-05 13:41:46,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:46,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152339867] [2021-06-05 13:41:46,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:47,042 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 13:41:47,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:47,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152339867] [2021-06-05 13:41:47,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152339867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:47,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492711137] [2021-06-05 13:41:47,043 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) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:47,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:41:47,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:47,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 13:41:47,140 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 13:41:47,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:41:47,144 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 13:41:47,144 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 13:41:47,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:41:47,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 13:41:47,151 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 13:41:47,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492711137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:47,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:47,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 13:41:47,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912461285] [2021-06-05 13:41:47,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:47,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:47,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:47,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:47,152 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 13:41:47,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:47,393 INFO L93 Difference]: Finished difference Result 7693 states and 20980 transitions. [2021-06-05 13:41:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:41:47,393 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 13:41:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:47,402 INFO L225 Difference]: With dead ends: 7693 [2021-06-05 13:41:47,402 INFO L226 Difference]: Without dead ends: 7662 [2021-06-05 13:41:47,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:41:47,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7662 states. [2021-06-05 13:41:47,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7662 to 6972. [2021-06-05 13:41:47,504 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 13:41:47,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6972 states to 6972 states and 19510 transitions. [2021-06-05 13:41:47,516 INFO L78 Accepts]: Start accepts. Automaton has 6972 states and 19510 transitions. Word has length 29 [2021-06-05 13:41:47,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:47,516 INFO L482 AbstractCegarLoop]: Abstraction has 6972 states and 19510 transitions. [2021-06-05 13:41:47,516 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 13:41:47,516 INFO L276 IsEmpty]: Start isEmpty. Operand 6972 states and 19510 transitions. [2021-06-05 13:41:47,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:47,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:47,520 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 13:41:47,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:47,721 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:47,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:47,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1507649858, now seen corresponding path program 11 times [2021-06-05 13:41:47,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:47,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480114049] [2021-06-05 13:41:47,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:47,775 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 13:41:47,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:47,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480114049] [2021-06-05 13:41:47,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480114049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:47,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806430806] [2021-06-05 13:41:47,775 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) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:47,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:41:47,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:47,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:41:47,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:47,892 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 13:41:47,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806430806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:47,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:47,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 13:41:47,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20620732] [2021-06-05 13:41:47,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:41:47,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:47,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:41:47,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:47,894 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 13:41:48,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:48,028 INFO L93 Difference]: Finished difference Result 6857 states and 19119 transitions. [2021-06-05 13:41:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:41:48,028 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 13:41:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:48,036 INFO L225 Difference]: With dead ends: 6857 [2021-06-05 13:41:48,036 INFO L226 Difference]: Without dead ends: 6823 [2021-06-05 13:41:48,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:48,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6823 states. [2021-06-05 13:41:48,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6823 to 6569. [2021-06-05 13:41:48,100 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 13:41:48,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6569 states to 6569 states and 18566 transitions. [2021-06-05 13:41:48,110 INFO L78 Accepts]: Start accepts. Automaton has 6569 states and 18566 transitions. Word has length 29 [2021-06-05 13:41:48,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:48,110 INFO L482 AbstractCegarLoop]: Abstraction has 6569 states and 18566 transitions. [2021-06-05 13:41:48,110 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 13:41:48,110 INFO L276 IsEmpty]: Start isEmpty. Operand 6569 states and 18566 transitions. [2021-06-05 13:41:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:48,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:48,113 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 13:41:48,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 13:41:48,313 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:48,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:48,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1002279274, now seen corresponding path program 8 times [2021-06-05 13:41:48,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:48,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617134757] [2021-06-05 13:41:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:48,366 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 13:41:48,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:48,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617134757] [2021-06-05 13:41:48,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617134757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:48,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194448153] [2021-06-05 13:41:48,367 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 13:41:48,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:48,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:48,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:41:48,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:48,452 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 13:41:48,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194448153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:48,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:48,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:41:48,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595347426] [2021-06-05 13:41:48,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:48,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:48,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:48,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:48,453 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 13:41:48,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:48,582 INFO L93 Difference]: Finished difference Result 6936 states and 19307 transitions. [2021-06-05 13:41:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:48,583 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 13:41:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:48,590 INFO L225 Difference]: With dead ends: 6936 [2021-06-05 13:41:48,590 INFO L226 Difference]: Without dead ends: 6928 [2021-06-05 13:41:48,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:48,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6928 states. [2021-06-05 13:41:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6928 to 6620. [2021-06-05 13:41:48,661 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 13:41:48,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 18675 transitions. [2021-06-05 13:41:48,671 INFO L78 Accepts]: Start accepts. Automaton has 6620 states and 18675 transitions. Word has length 29 [2021-06-05 13:41:48,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:48,671 INFO L482 AbstractCegarLoop]: Abstraction has 6620 states and 18675 transitions. [2021-06-05 13:41:48,671 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 13:41:48,671 INFO L276 IsEmpty]: Start isEmpty. Operand 6620 states and 18675 transitions. [2021-06-05 13:41:48,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:48,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:48,674 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 13:41:48,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:48,874 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:48,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:48,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1792355030, now seen corresponding path program 12 times [2021-06-05 13:41:48,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:48,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304004286] [2021-06-05 13:41:48,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:48,924 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 13:41:48,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:48,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304004286] [2021-06-05 13:41:48,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304004286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:48,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527357890] [2021-06-05 13:41:48,926 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 13:41:48,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:41:48,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:48,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:41:48,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:49,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 13:41:49,040 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 13:41:49,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:41:49,043 INFO L628 ElimStorePlain]: treesize reduction 14, result has 6.7 percent of original size [2021-06-05 13:41:49,043 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 13:41:49,043 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 13:41:49,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2021-06-05 13:41:49,050 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 13:41:49,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527357890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:49,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:49,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 13:41:49,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331776360] [2021-06-05 13:41:49,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:49,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:49,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:49,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:49,052 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 13:41:49,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:49,271 INFO L93 Difference]: Finished difference Result 6433 states and 17744 transitions. [2021-06-05 13:41:49,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:49,272 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 13:41:49,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:49,280 INFO L225 Difference]: With dead ends: 6433 [2021-06-05 13:41:49,280 INFO L226 Difference]: Without dead ends: 6334 [2021-06-05 13:41:49,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:49,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6334 states. [2021-06-05 13:41:49,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6334 to 5949. [2021-06-05 13:41:49,364 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 13:41:49,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5949 states to 5949 states and 16755 transitions. [2021-06-05 13:41:49,376 INFO L78 Accepts]: Start accepts. Automaton has 5949 states and 16755 transitions. Word has length 29 [2021-06-05 13:41:49,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:49,376 INFO L482 AbstractCegarLoop]: Abstraction has 5949 states and 16755 transitions. [2021-06-05 13:41:49,376 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 13:41:49,376 INFO L276 IsEmpty]: Start isEmpty. Operand 5949 states and 16755 transitions. [2021-06-05 13:41:49,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:49,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:49,380 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 13:41:49,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-06-05 13:41:49,597 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:49,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:49,597 INFO L82 PathProgramCache]: Analyzing trace with hash 869370402, now seen corresponding path program 41 times [2021-06-05 13:41:49,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:49,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193638695] [2021-06-05 13:41:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:49,637 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 13:41:49,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:49,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193638695] [2021-06-05 13:41:49,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193638695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:49,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468489551] [2021-06-05 13:41:49,637 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 13:41:49,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:41:49,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:49,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:41:49,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:49,702 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 13:41:49,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468489551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:49,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:49,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 13:41:49,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225843609] [2021-06-05 13:41:49,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:49,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:49,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:49,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:49,703 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 13:41:49,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:49,810 INFO L93 Difference]: Finished difference Result 6991 states and 19595 transitions. [2021-06-05 13:41:49,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:41:49,811 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 13:41:49,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:49,818 INFO L225 Difference]: With dead ends: 6991 [2021-06-05 13:41:49,818 INFO L226 Difference]: Without dead ends: 6978 [2021-06-05 13:41:49,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:49,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6978 states. [2021-06-05 13:41:49,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6978 to 6732. [2021-06-05 13:41:49,884 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 13:41:49,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6732 states to 6732 states and 19081 transitions. [2021-06-05 13:41:49,894 INFO L78 Accepts]: Start accepts. Automaton has 6732 states and 19081 transitions. Word has length 29 [2021-06-05 13:41:49,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:49,894 INFO L482 AbstractCegarLoop]: Abstraction has 6732 states and 19081 transitions. [2021-06-05 13:41:49,894 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 13:41:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 6732 states and 19081 transitions. [2021-06-05 13:41:49,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:49,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:49,896 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 13:41:50,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:50,097 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:50,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:50,098 INFO L82 PathProgramCache]: Analyzing trace with hash -109137342, now seen corresponding path program 13 times [2021-06-05 13:41:50,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:50,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074986771] [2021-06-05 13:41:50,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:50,154 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 13:41:50,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:50,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074986771] [2021-06-05 13:41:50,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074986771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:50,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733250308] [2021-06-05 13:41:50,155 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 13:41:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:50,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:41:50,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:50,226 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 13:41:50,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733250308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:50,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:50,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:41:50,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055050665] [2021-06-05 13:41:50,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:41:50,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:50,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:41:50,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:50,227 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 13:41:50,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:50,422 INFO L93 Difference]: Finished difference Result 6655 states and 18587 transitions. [2021-06-05 13:41:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:41:50,422 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 13:41:50,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:50,431 INFO L225 Difference]: With dead ends: 6655 [2021-06-05 13:41:50,432 INFO L226 Difference]: Without dead ends: 6601 [2021-06-05 13:41:50,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:41:50,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2021-06-05 13:41:50,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 6248. [2021-06-05 13:41:50,509 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 13:41:50,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 17682 transitions. [2021-06-05 13:41:50,519 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 17682 transitions. Word has length 29 [2021-06-05 13:41:50,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:50,519 INFO L482 AbstractCegarLoop]: Abstraction has 6248 states and 17682 transitions. [2021-06-05 13:41:50,519 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 13:41:50,519 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 17682 transitions. [2021-06-05 13:41:50,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:41:50,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:50,522 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 13:41:50,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:50,723 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:50,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:50,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1428842088, now seen corresponding path program 42 times [2021-06-05 13:41:50,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:50,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431059830] [2021-06-05 13:41:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:50,849 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 13:41:50,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:50,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431059830] [2021-06-05 13:41:50,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431059830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:50,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914945602] [2021-06-05 13:41:50,850 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 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 13:41:50,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:41:50,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:50,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:50,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:50,942 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 13:41:50,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914945602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:50,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:50,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:41:50,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796035668] [2021-06-05 13:41:50,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:50,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:50,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:50,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:50,944 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 13:41:51,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:51,168 INFO L93 Difference]: Finished difference Result 6779 states and 18724 transitions. [2021-06-05 13:41:51,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:41:51,168 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 13:41:51,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:51,175 INFO L225 Difference]: With dead ends: 6779 [2021-06-05 13:41:51,175 INFO L226 Difference]: Without dead ends: 6779 [2021-06-05 13:41:51,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:41:51,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6779 states. [2021-06-05 13:41:51,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6779 to 6214. [2021-06-05 13:41:51,238 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 13:41:51,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 17580 transitions. [2021-06-05 13:41:51,248 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 17580 transitions. Word has length 32 [2021-06-05 13:41:51,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:51,248 INFO L482 AbstractCegarLoop]: Abstraction has 6214 states and 17580 transitions. [2021-06-05 13:41:51,248 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 13:41:51,248 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 17580 transitions. [2021-06-05 13:41:51,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:41:51,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:51,252 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 13:41:51,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:51,467 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:51,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:51,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1675261659, now seen corresponding path program 43 times [2021-06-05 13:41:51,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:51,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872385475] [2021-06-05 13:41:51,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:51,523 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 13:41:51,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:51,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872385475] [2021-06-05 13:41:51,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872385475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:51,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130383469] [2021-06-05 13:41:51,524 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 13:41:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:51,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:51,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:51,628 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 13:41:51,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130383469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:51,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:51,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-05 13:41:51,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174087583] [2021-06-05 13:41:51,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:51,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:51,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:51,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:51,629 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 13:41:51,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:51,773 INFO L93 Difference]: Finished difference Result 9059 states and 24818 transitions. [2021-06-05 13:41:51,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:41:51,774 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 13:41:51,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:51,786 INFO L225 Difference]: With dead ends: 9059 [2021-06-05 13:41:51,786 INFO L226 Difference]: Without dead ends: 9035 [2021-06-05 13:41:51,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:41:51,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9035 states. [2021-06-05 13:41:51,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9035 to 7541. [2021-06-05 13:41:51,877 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 13:41:51,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7541 states to 7541 states and 21523 transitions. [2021-06-05 13:41:51,890 INFO L78 Accepts]: Start accepts. Automaton has 7541 states and 21523 transitions. Word has length 32 [2021-06-05 13:41:51,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:51,890 INFO L482 AbstractCegarLoop]: Abstraction has 7541 states and 21523 transitions. [2021-06-05 13:41:51,890 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 13:41:51,890 INFO L276 IsEmpty]: Start isEmpty. Operand 7541 states and 21523 transitions. [2021-06-05 13:41:51,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:41:51,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:51,894 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 13:41:52,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 13:41:52,095 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:52,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:52,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1825167733, now seen corresponding path program 44 times [2021-06-05 13:41:52,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:52,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33840190] [2021-06-05 13:41:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:52,136 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 13:41:52,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:52,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33840190] [2021-06-05 13:41:52,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33840190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:52,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078292867] [2021-06-05 13:41:52,136 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 13:41:52,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:52,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:52,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:52,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:52,221 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 13:41:52,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078292867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:52,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:52,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 13:41:52,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014735356] [2021-06-05 13:41:52,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:41:52,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:52,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:41:52,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:52,222 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 13:41:52,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:52,461 INFO L93 Difference]: Finished difference Result 9025 states and 24686 transitions. [2021-06-05 13:41:52,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:41:52,462 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 13:41:52,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:52,477 INFO L225 Difference]: With dead ends: 9025 [2021-06-05 13:41:52,477 INFO L226 Difference]: Without dead ends: 9025 [2021-06-05 13:41:52,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:41:52,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9025 states. [2021-06-05 13:41:52,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9025 to 7365. [2021-06-05 13:41:52,601 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 13:41:52,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7365 states to 7365 states and 20968 transitions. [2021-06-05 13:41:52,617 INFO L78 Accepts]: Start accepts. Automaton has 7365 states and 20968 transitions. Word has length 32 [2021-06-05 13:41:52,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:52,617 INFO L482 AbstractCegarLoop]: Abstraction has 7365 states and 20968 transitions. [2021-06-05 13:41:52,617 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 13:41:52,617 INFO L276 IsEmpty]: Start isEmpty. Operand 7365 states and 20968 transitions. [2021-06-05 13:41:52,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:41:52,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:52,622 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 13:41:52,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 13:41:52,823 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:52,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:52,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1537983116, now seen corresponding path program 45 times [2021-06-05 13:41:52,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:52,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004934408] [2021-06-05 13:41:52,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:52,867 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 13:41:52,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:52,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004934408] [2021-06-05 13:41:52,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004934408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:52,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474503821] [2021-06-05 13:41:52,868 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 13:41:52,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:41:52,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:52,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:52,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:53,058 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 13:41:53,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474503821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:53,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:53,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 13:41:53,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788150681] [2021-06-05 13:41:53,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:41:53,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:53,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:41:53,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:41:53,059 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 13:41:53,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:53,493 INFO L93 Difference]: Finished difference Result 8303 states and 22757 transitions. [2021-06-05 13:41:53,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:41:53,493 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 13:41:53,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:53,503 INFO L225 Difference]: With dead ends: 8303 [2021-06-05 13:41:53,503 INFO L226 Difference]: Without dead ends: 8260 [2021-06-05 13:41:53,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 358.6ms TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:41:53,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8260 states. [2021-06-05 13:41:53,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8260 to 7571. [2021-06-05 13:41:53,592 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 13:41:53,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 21322 transitions. [2021-06-05 13:41:53,605 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 21322 transitions. Word has length 32 [2021-06-05 13:41:53,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:53,605 INFO L482 AbstractCegarLoop]: Abstraction has 7571 states and 21322 transitions. [2021-06-05 13:41:53,606 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 13:41:53,606 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 21322 transitions. [2021-06-05 13:41:53,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:41:53,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:53,613 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 13:41:53,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 13:41:53,829 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:53,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:53,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1465178531, now seen corresponding path program 46 times [2021-06-05 13:41:53,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:53,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696671509] [2021-06-05 13:41:53,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:53,876 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 13:41:53,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:53,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696671509] [2021-06-05 13:41:53,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696671509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:53,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274816016] [2021-06-05 13:41:53,877 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 13:41:53,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:53,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:53,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:53,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:53,961 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 13:41:53,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274816016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:53,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:53,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-06-05 13:41:53,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265514206] [2021-06-05 13:41:53,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:41:53,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:53,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:41:53,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:53,962 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 13:41:54,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:54,154 INFO L93 Difference]: Finished difference Result 13088 states and 35868 transitions. [2021-06-05 13:41:54,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:41:54,155 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 13:41:54,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:54,177 INFO L225 Difference]: With dead ends: 13088 [2021-06-05 13:41:54,177 INFO L226 Difference]: Without dead ends: 13088 [2021-06-05 13:41:54,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:41:54,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13088 states. [2021-06-05 13:41:54,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13088 to 10587. [2021-06-05 13:41:54,362 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 13:41:54,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10587 states to 10587 states and 30390 transitions. [2021-06-05 13:41:54,382 INFO L78 Accepts]: Start accepts. Automaton has 10587 states and 30390 transitions. Word has length 32 [2021-06-05 13:41:54,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:54,382 INFO L482 AbstractCegarLoop]: Abstraction has 10587 states and 30390 transitions. [2021-06-05 13:41:54,382 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 13:41:54,382 INFO L276 IsEmpty]: Start isEmpty. Operand 10587 states and 30390 transitions. [2021-06-05 13:41:54,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:41:54,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:54,387 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 13:41:54,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:54,588 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:54,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:54,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1653853746, now seen corresponding path program 47 times [2021-06-05 13:41:54,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:54,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168145723] [2021-06-05 13:41:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:54,627 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 13:41:54,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:54,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168145723] [2021-06-05 13:41:54,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168145723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:54,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690651607] [2021-06-05 13:41:54,628 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 13:41:54,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:41:54,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:54,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:54,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:54,742 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 13:41:54,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690651607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:54,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:54,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-06-05 13:41:54,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147655858] [2021-06-05 13:41:54,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:41:54,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:54,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:41:54,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:54,744 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 13:41:54,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:54,944 INFO L93 Difference]: Finished difference Result 11705 states and 32668 transitions. [2021-06-05 13:41:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:41:54,944 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 13:41:54,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:54,964 INFO L225 Difference]: With dead ends: 11705 [2021-06-05 13:41:54,964 INFO L226 Difference]: Without dead ends: 11705 [2021-06-05 13:41:54,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:41:54,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11705 states. [2021-06-05 13:41:55,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11705 to 10573. [2021-06-05 13:41:55,138 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 13:41:55,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10573 states to 10573 states and 30204 transitions. [2021-06-05 13:41:55,157 INFO L78 Accepts]: Start accepts. Automaton has 10573 states and 30204 transitions. Word has length 32 [2021-06-05 13:41:55,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:55,157 INFO L482 AbstractCegarLoop]: Abstraction has 10573 states and 30204 transitions. [2021-06-05 13:41:55,157 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 13:41:55,157 INFO L276 IsEmpty]: Start isEmpty. Operand 10573 states and 30204 transitions. [2021-06-05 13:41:55,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:41:55,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:55,161 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 13:41:55,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 13:41:55,362 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:55,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:55,362 INFO L82 PathProgramCache]: Analyzing trace with hash 2101937765, now seen corresponding path program 48 times [2021-06-05 13:41:55,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:55,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407869835] [2021-06-05 13:41:55,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:55,401 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 13:41:55,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:55,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407869835] [2021-06-05 13:41:55,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407869835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:55,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048619603] [2021-06-05 13:41:55,402 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 13:41:55,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:41:55,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:55,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:55,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:55,498 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 13:41:55,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048619603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:55,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:55,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 13:41:55,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916210446] [2021-06-05 13:41:55,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:41:55,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:55,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:41:55,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:55,499 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 13:41:55,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:55,683 INFO L93 Difference]: Finished difference Result 17407 states and 48712 transitions. [2021-06-05 13:41:55,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:41:55,683 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 13:41:55,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:55,713 INFO L225 Difference]: With dead ends: 17407 [2021-06-05 13:41:55,714 INFO L226 Difference]: Without dead ends: 17375 [2021-06-05 13:41:55,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:41:55,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17375 states. [2021-06-05 13:41:55,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17375 to 13902. [2021-06-05 13:41:55,963 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 13:41:55,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13902 states to 13902 states and 40270 transitions. [2021-06-05 13:41:55,990 INFO L78 Accepts]: Start accepts. Automaton has 13902 states and 40270 transitions. Word has length 32 [2021-06-05 13:41:55,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:55,990 INFO L482 AbstractCegarLoop]: Abstraction has 13902 states and 40270 transitions. [2021-06-05 13:41:55,990 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 13:41:55,990 INFO L276 IsEmpty]: Start isEmpty. Operand 13902 states and 40270 transitions. [2021-06-05 13:41:55,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:41:55,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:55,995 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 13:41:56,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 13:41:56,195 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:56,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:56,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1480057355, now seen corresponding path program 49 times [2021-06-05 13:41:56,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:56,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072373069] [2021-06-05 13:41:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:56,234 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 13:41:56,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:56,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072373069] [2021-06-05 13:41:56,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072373069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:56,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265213079] [2021-06-05 13:41:56,235 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 13:41:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:56,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:56,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:56,342 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 13:41:56,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265213079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:56,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:56,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 13:41:56,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830241140] [2021-06-05 13:41:56,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:41:56,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:56,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:41:56,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:56,343 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 13:41:56,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:56,554 INFO L93 Difference]: Finished difference Result 17229 states and 47592 transitions. [2021-06-05 13:41:56,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:41:56,555 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 13:41:56,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:56,577 INFO L225 Difference]: With dead ends: 17229 [2021-06-05 13:41:56,578 INFO L226 Difference]: Without dead ends: 17226 [2021-06-05 13:41:56,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:41:56,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17226 states. [2021-06-05 13:41:56,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17226 to 13921. [2021-06-05 13:41:56,764 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 13:41:56,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13921 states to 13921 states and 40232 transitions. [2021-06-05 13:41:56,788 INFO L78 Accepts]: Start accepts. Automaton has 13921 states and 40232 transitions. Word has length 32 [2021-06-05 13:41:56,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:56,789 INFO L482 AbstractCegarLoop]: Abstraction has 13921 states and 40232 transitions. [2021-06-05 13:41:56,789 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 13:41:56,789 INFO L276 IsEmpty]: Start isEmpty. Operand 13921 states and 40232 transitions. [2021-06-05 13:41:56,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:41:56,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:56,793 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 13:41:56,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 13:41:56,994 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:56,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:56,994 INFO L82 PathProgramCache]: Analyzing trace with hash -157515101, now seen corresponding path program 50 times [2021-06-05 13:41:56,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:56,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878742952] [2021-06-05 13:41:56,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:57,043 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 13:41:57,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:57,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878742952] [2021-06-05 13:41:57,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878742952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:57,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947977974] [2021-06-05 13:41:57,044 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) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:57,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:57,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:57,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:57,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:57,136 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 13:41:57,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947977974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:57,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:57,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-06-05 13:41:57,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750779951] [2021-06-05 13:41:57,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:41:57,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:57,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:41:57,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:57,137 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 13:41:57,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:57,399 INFO L93 Difference]: Finished difference Result 17332 states and 47741 transitions. [2021-06-05 13:41:57,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:41:57,400 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 13:41:57,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:57,423 INFO L225 Difference]: With dead ends: 17332 [2021-06-05 13:41:57,423 INFO L226 Difference]: Without dead ends: 17329 [2021-06-05 13:41:57,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:41:57,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17329 states. [2021-06-05 13:41:57,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17329 to 13802. [2021-06-05 13:41:57,610 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 13:41:57,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 39790 transitions. [2021-06-05 13:41:57,634 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 39790 transitions. Word has length 32 [2021-06-05 13:41:57,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:57,635 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 39790 transitions. [2021-06-05 13:41:57,635 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 13:41:57,635 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 39790 transitions. [2021-06-05 13:41:57,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:41:57,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:57,639 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 13:41:57,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 13:41:57,839 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:57,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:57,840 INFO L82 PathProgramCache]: Analyzing trace with hash 188377863, now seen corresponding path program 51 times [2021-06-05 13:41:57,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:57,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245600158] [2021-06-05 13:41:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:57,908 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 13:41:57,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:57,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245600158] [2021-06-05 13:41:57,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245600158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:57,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893569489] [2021-06-05 13:41:57,908 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 13:41:57,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:41:57,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:57,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:41:57,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:58,127 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 13:41:58,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893569489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:58,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:58,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-06-05 13:41:58,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251662189] [2021-06-05 13:41:58,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:41:58,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:58,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:41:58,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:41:58,128 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 13:41:59,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:59,185 INFO L93 Difference]: Finished difference Result 22708 states and 63895 transitions. [2021-06-05 13:41:59,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:41:59,185 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 13:41:59,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:59,219 INFO L225 Difference]: With dead ends: 22708 [2021-06-05 13:41:59,219 INFO L226 Difference]: Without dead ends: 22654 [2021-06-05 13:41:59,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 786.6ms TimeCoverageRelationStatistics Valid=535, Invalid=1817, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 13:41:59,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22654 states. [2021-06-05 13:41:59,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22654 to 15246. [2021-06-05 13:41:59,487 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 13:41:59,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15246 states to 15246 states and 43831 transitions. [2021-06-05 13:41:59,515 INFO L78 Accepts]: Start accepts. Automaton has 15246 states and 43831 transitions. Word has length 32 [2021-06-05 13:41:59,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:59,515 INFO L482 AbstractCegarLoop]: Abstraction has 15246 states and 43831 transitions. [2021-06-05 13:41:59,515 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 13:41:59,515 INFO L276 IsEmpty]: Start isEmpty. Operand 15246 states and 43831 transitions. [2021-06-05 13:41:59,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:41:59,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:59,521 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 13:41:59,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 13:41:59,722 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:59,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:59,722 INFO L82 PathProgramCache]: Analyzing trace with hash -639720651, now seen corresponding path program 9 times [2021-06-05 13:41:59,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:59,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431565883] [2021-06-05 13:41:59,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:59,802 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 13:41:59,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:59,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431565883] [2021-06-05 13:41:59,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431565883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:59,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587426289] [2021-06-05 13:41:59,803 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 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 13:41:59,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:41:59,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:59,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:41:59,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:59,894 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 13:41:59,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587426289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:59,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:59,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:41:59,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501679212] [2021-06-05 13:41:59,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:41:59,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:59,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:41:59,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:41:59,896 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 13:42:00,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:00,297 INFO L93 Difference]: Finished difference Result 15940 states and 45262 transitions. [2021-06-05 13:42:00,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:42:00,297 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 13:42:00,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:00,324 INFO L225 Difference]: With dead ends: 15940 [2021-06-05 13:42:00,325 INFO L226 Difference]: Without dead ends: 15903 [2021-06-05 13:42:00,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:42:00,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15903 states. [2021-06-05 13:42:00,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15903 to 15141. [2021-06-05 13:42:00,508 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 13:42:00,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15141 states to 15141 states and 43547 transitions. [2021-06-05 13:42:00,628 INFO L78 Accepts]: Start accepts. Automaton has 15141 states and 43547 transitions. Word has length 35 [2021-06-05 13:42:00,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:00,628 INFO L482 AbstractCegarLoop]: Abstraction has 15141 states and 43547 transitions. [2021-06-05 13:42:00,628 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 13:42:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand 15141 states and 43547 transitions. [2021-06-05 13:42:00,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:00,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:00,634 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 13:42:00,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:00,834 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:00,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:00,834 INFO L82 PathProgramCache]: Analyzing trace with hash 827459317, now seen corresponding path program 14 times [2021-06-05 13:42:00,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:00,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015335961] [2021-06-05 13:42:00,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:00,926 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 13:42:00,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:00,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015335961] [2021-06-05 13:42:00,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015335961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:00,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817923110] [2021-06-05 13:42:00,927 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 13:42:00,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:00,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:00,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:42:00,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:01,119 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 13:42:01,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817923110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:01,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:01,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 13:42:01,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844974662] [2021-06-05 13:42:01,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:01,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:01,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:01,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:01,120 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 13:42:01,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:01,597 INFO L93 Difference]: Finished difference Result 15119 states and 43386 transitions. [2021-06-05 13:42:01,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:01,597 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 13:42:01,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:01,617 INFO L225 Difference]: With dead ends: 15119 [2021-06-05 13:42:01,617 INFO L226 Difference]: Without dead ends: 15016 [2021-06-05 13:42:01,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:01,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15016 states. [2021-06-05 13:42:01,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15016 to 14977. [2021-06-05 13:42:01,827 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 13:42:01,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14977 states to 14977 states and 43110 transitions. [2021-06-05 13:42:01,853 INFO L78 Accepts]: Start accepts. Automaton has 14977 states and 43110 transitions. Word has length 35 [2021-06-05 13:42:01,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:01,853 INFO L482 AbstractCegarLoop]: Abstraction has 14977 states and 43110 transitions. [2021-06-05 13:42:01,853 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 13:42:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 14977 states and 43110 transitions. [2021-06-05 13:42:01,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:01,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:01,858 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 13:42:02,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 13:42:02,060 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:02,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:02,060 INFO L82 PathProgramCache]: Analyzing trace with hash 999532737, now seen corresponding path program 15 times [2021-06-05 13:42:02,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:02,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511325042] [2021-06-05 13:42:02,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:02,120 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 13:42:02,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:02,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511325042] [2021-06-05 13:42:02,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511325042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:02,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339219389] [2021-06-05 13:42:02,121 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 13:42:02,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:42:02,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:02,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:42:02,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:02,212 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 13:42:02,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339219389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:02,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:02,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:42:02,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169293989] [2021-06-05 13:42:02,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:42:02,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:02,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:42:02,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:02,213 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 13:42:02,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:02,367 INFO L93 Difference]: Finished difference Result 15202 states and 43548 transitions. [2021-06-05 13:42:02,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:02,368 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 13:42:02,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:02,386 INFO L225 Difference]: With dead ends: 15202 [2021-06-05 13:42:02,386 INFO L226 Difference]: Without dead ends: 15202 [2021-06-05 13:42:02,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:02,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15202 states. [2021-06-05 13:42:02,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15202 to 14977. [2021-06-05 13:42:02,546 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 13:42:02,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14977 states to 14977 states and 43110 transitions. [2021-06-05 13:42:02,572 INFO L78 Accepts]: Start accepts. Automaton has 14977 states and 43110 transitions. Word has length 35 [2021-06-05 13:42:02,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:02,572 INFO L482 AbstractCegarLoop]: Abstraction has 14977 states and 43110 transitions. [2021-06-05 13:42:02,572 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 13:42:02,572 INFO L276 IsEmpty]: Start isEmpty. Operand 14977 states and 43110 transitions. [2021-06-05 13:42:02,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:02,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:02,577 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 13:42:02,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:02,778 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:02,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:02,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1845490552, now seen corresponding path program 10 times [2021-06-05 13:42:02,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:02,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135153634] [2021-06-05 13:42:02,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:02,858 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 13:42:02,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:02,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135153634] [2021-06-05 13:42:02,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135153634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:02,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970479129] [2021-06-05 13:42:02,858 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 13:42:02,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:02,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:02,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:42:02,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:02,947 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 13:42:02,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970479129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:02,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:02,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 13:42:02,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799049935] [2021-06-05 13:42:02,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:02,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:02,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:02,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:02,948 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 13:42:03,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:03,145 INFO L93 Difference]: Finished difference Result 16718 states and 46945 transitions. [2021-06-05 13:42:03,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:03,146 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 13:42:03,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:03,169 INFO L225 Difference]: With dead ends: 16718 [2021-06-05 13:42:03,169 INFO L226 Difference]: Without dead ends: 16694 [2021-06-05 13:42:03,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:42:03,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16694 states. [2021-06-05 13:42:03,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16694 to 15013. [2021-06-05 13:42:03,438 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 13:42:03,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15013 states to 15013 states and 43172 transitions. [2021-06-05 13:42:03,466 INFO L78 Accepts]: Start accepts. Automaton has 15013 states and 43172 transitions. Word has length 35 [2021-06-05 13:42:03,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:03,467 INFO L482 AbstractCegarLoop]: Abstraction has 15013 states and 43172 transitions. [2021-06-05 13:42:03,467 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 13:42:03,467 INFO L276 IsEmpty]: Start isEmpty. Operand 15013 states and 43172 transitions. [2021-06-05 13:42:03,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:03,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:03,473 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 13:42:03,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:03,673 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:03,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:03,674 INFO L82 PathProgramCache]: Analyzing trace with hash -731106251, now seen corresponding path program 16 times [2021-06-05 13:42:03,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:03,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736773196] [2021-06-05 13:42:03,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:03,730 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 13:42:03,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:03,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736773196] [2021-06-05 13:42:03,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736773196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:03,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667993817] [2021-06-05 13:42:03,731 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 13:42:03,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:03,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:03,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:42:03,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:03,826 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 13:42:03,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667993817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:03,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:03,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 13:42:03,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444033491] [2021-06-05 13:42:03,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:42:03,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:03,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:42:03,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:03,827 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 13:42:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:04,089 INFO L93 Difference]: Finished difference Result 15432 states and 43972 transitions. [2021-06-05 13:42:04,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:04,089 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 13:42:04,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:04,112 INFO L225 Difference]: With dead ends: 15432 [2021-06-05 13:42:04,112 INFO L226 Difference]: Without dead ends: 15289 [2021-06-05 13:42:04,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:04,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15289 states. [2021-06-05 13:42:04,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15289 to 14996. [2021-06-05 13:42:04,314 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 13:42:04,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14996 states to 14996 states and 42939 transitions. [2021-06-05 13:42:04,344 INFO L78 Accepts]: Start accepts. Automaton has 14996 states and 42939 transitions. Word has length 35 [2021-06-05 13:42:04,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:04,344 INFO L482 AbstractCegarLoop]: Abstraction has 14996 states and 42939 transitions. [2021-06-05 13:42:04,344 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 13:42:04,344 INFO L276 IsEmpty]: Start isEmpty. Operand 14996 states and 42939 transitions. [2021-06-05 13:42:04,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:04,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:04,351 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 13:42:04,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 13:42:04,553 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:04,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:04,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1344642431, now seen corresponding path program 17 times [2021-06-05 13:42:04,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:04,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924301515] [2021-06-05 13:42:04,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:04,624 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 13:42:04,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:04,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924301515] [2021-06-05 13:42:04,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924301515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:04,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510726244] [2021-06-05 13:42:04,625 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 13:42:04,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:42:04,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:04,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:42:04,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:04,719 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 13:42:04,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510726244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:04,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:04,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:42:04,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392589600] [2021-06-05 13:42:04,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:42:04,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:04,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:42:04,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:04,720 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 13:42:05,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:05,001 INFO L93 Difference]: Finished difference Result 15805 states and 44721 transitions. [2021-06-05 13:42:05,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:05,001 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 13:42:05,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:05,028 INFO L225 Difference]: With dead ends: 15805 [2021-06-05 13:42:05,028 INFO L226 Difference]: Without dead ends: 15793 [2021-06-05 13:42:05,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:05,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15793 states. [2021-06-05 13:42:05,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15793 to 15263. [2021-06-05 13:42:05,279 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 13:42:05,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15263 states to 15263 states and 43599 transitions. [2021-06-05 13:42:05,319 INFO L78 Accepts]: Start accepts. Automaton has 15263 states and 43599 transitions. Word has length 35 [2021-06-05 13:42:05,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:05,319 INFO L482 AbstractCegarLoop]: Abstraction has 15263 states and 43599 transitions. [2021-06-05 13:42:05,319 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 13:42:05,320 INFO L276 IsEmpty]: Start isEmpty. Operand 15263 states and 43599 transitions. [2021-06-05 13:42:05,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:05,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:05,327 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 13:42:05,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 13:42:05,527 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:05,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:05,527 INFO L82 PathProgramCache]: Analyzing trace with hash 797274903, now seen corresponding path program 18 times [2021-06-05 13:42:05,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:05,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996123203] [2021-06-05 13:42:05,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:05,593 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 13:42:05,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:05,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996123203] [2021-06-05 13:42:05,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996123203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:05,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914017271] [2021-06-05 13:42:05,593 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 13:42:05,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 13:42:05,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:05,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:42:05,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:05,685 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 13:42:05,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914017271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:05,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:05,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:42:05,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892624081] [2021-06-05 13:42:05,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:05,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:05,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:05,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:05,686 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 13:42:06,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:06,014 INFO L93 Difference]: Finished difference Result 16259 states and 45639 transitions. [2021-06-05 13:42:06,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:06,014 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 13:42:06,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:06,039 INFO L225 Difference]: With dead ends: 16259 [2021-06-05 13:42:06,040 INFO L226 Difference]: Without dead ends: 16247 [2021-06-05 13:42:06,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:06,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16247 states. [2021-06-05 13:42:06,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16247 to 14972. [2021-06-05 13:42:06,260 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 13:42:06,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14972 states to 14972 states and 42737 transitions. [2021-06-05 13:42:06,289 INFO L78 Accepts]: Start accepts. Automaton has 14972 states and 42737 transitions. Word has length 35 [2021-06-05 13:42:06,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:06,289 INFO L482 AbstractCegarLoop]: Abstraction has 14972 states and 42737 transitions. [2021-06-05 13:42:06,289 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 13:42:06,289 INFO L276 IsEmpty]: Start isEmpty. Operand 14972 states and 42737 transitions. [2021-06-05 13:42:06,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:06,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:06,295 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 13:42:06,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:06,496 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:06,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:06,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1965133284, now seen corresponding path program 19 times [2021-06-05 13:42:06,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:06,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525231705] [2021-06-05 13:42:06,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:06,554 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 13:42:06,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:06,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525231705] [2021-06-05 13:42:06,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525231705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:06,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328083865] [2021-06-05 13:42:06,555 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 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 13:42:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:06,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:42:06,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:06,658 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 13:42:06,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328083865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:06,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:06,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 13:42:06,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086769126] [2021-06-05 13:42:06,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:06,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:06,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:06,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:06,660 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 13:42:06,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:06,852 INFO L93 Difference]: Finished difference Result 15256 states and 43217 transitions. [2021-06-05 13:42:06,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:42:06,852 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 13:42:06,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:06,878 INFO L225 Difference]: With dead ends: 15256 [2021-06-05 13:42:06,878 INFO L226 Difference]: Without dead ends: 15235 [2021-06-05 13:42:06,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:06,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15235 states. [2021-06-05 13:42:07,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15235 to 14340. [2021-06-05 13:42:07,087 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 13:42:07,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14340 states to 14340 states and 41025 transitions. [2021-06-05 13:42:07,116 INFO L78 Accepts]: Start accepts. Automaton has 14340 states and 41025 transitions. Word has length 35 [2021-06-05 13:42:07,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:07,116 INFO L482 AbstractCegarLoop]: Abstraction has 14340 states and 41025 transitions. [2021-06-05 13:42:07,116 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 13:42:07,116 INFO L276 IsEmpty]: Start isEmpty. Operand 14340 states and 41025 transitions. [2021-06-05 13:42:07,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:07,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:07,122 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 13:42:07,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 13:42:07,322 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:07,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:07,323 INFO L82 PathProgramCache]: Analyzing trace with hash -729647013, now seen corresponding path program 11 times [2021-06-05 13:42:07,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:07,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322954715] [2021-06-05 13:42:07,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:07,385 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 13:42:07,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:07,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322954715] [2021-06-05 13:42:07,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322954715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:07,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160463448] [2021-06-05 13:42:07,386 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 13:42:07,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 13:42:07,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:07,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:42:07,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:07,589 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 13:42:07,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160463448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:07,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:07,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:42:07,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384205432] [2021-06-05 13:42:07,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:42:07,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:07,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:42:07,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:07,590 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 13:42:07,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:07,830 INFO L93 Difference]: Finished difference Result 15289 states and 42956 transitions. [2021-06-05 13:42:07,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:07,831 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 13:42:07,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:07,856 INFO L225 Difference]: With dead ends: 15289 [2021-06-05 13:42:07,856 INFO L226 Difference]: Without dead ends: 15273 [2021-06-05 13:42:07,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:07,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15273 states. [2021-06-05 13:42:08,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15273 to 14606. [2021-06-05 13:42:08,057 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 13:42:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14606 states to 14606 states and 41593 transitions. [2021-06-05 13:42:08,086 INFO L78 Accepts]: Start accepts. Automaton has 14606 states and 41593 transitions. Word has length 35 [2021-06-05 13:42:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:08,086 INFO L482 AbstractCegarLoop]: Abstraction has 14606 states and 41593 transitions. [2021-06-05 13:42:08,086 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 13:42:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 14606 states and 41593 transitions. [2021-06-05 13:42:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:08,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:08,092 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 13:42:08,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:08,292 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:08,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:08,292 INFO L82 PathProgramCache]: Analyzing trace with hash 770685979, now seen corresponding path program 20 times [2021-06-05 13:42:08,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:08,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473015823] [2021-06-05 13:42:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:08,350 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 13:42:08,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:08,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473015823] [2021-06-05 13:42:08,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473015823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:08,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076016297] [2021-06-05 13:42:08,351 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 13:42:08,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:08,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:08,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:42:08,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:08,458 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 13:42:08,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076016297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:08,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:08,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 13:42:08,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098843004] [2021-06-05 13:42:08,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:42:08,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:08,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:42:08,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:08,460 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 13:42:08,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:08,775 INFO L93 Difference]: Finished difference Result 14012 states and 39306 transitions. [2021-06-05 13:42:08,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:08,776 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 13:42:08,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:08,795 INFO L225 Difference]: With dead ends: 14012 [2021-06-05 13:42:08,795 INFO L226 Difference]: Without dead ends: 13783 [2021-06-05 13:42:08,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:08,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13783 states. [2021-06-05 13:42:08,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13783 to 13424. [2021-06-05 13:42:08,966 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 13:42:08,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13424 states to 13424 states and 37606 transitions. [2021-06-05 13:42:08,990 INFO L78 Accepts]: Start accepts. Automaton has 13424 states and 37606 transitions. Word has length 35 [2021-06-05 13:42:08,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:08,990 INFO L482 AbstractCegarLoop]: Abstraction has 13424 states and 37606 transitions. [2021-06-05 13:42:08,990 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 13:42:08,991 INFO L276 IsEmpty]: Start isEmpty. Operand 13424 states and 37606 transitions. [2021-06-05 13:42:08,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:08,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:08,996 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 13:42:09,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:09,196 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:09,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:09,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1491207704, now seen corresponding path program 21 times [2021-06-05 13:42:09,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:09,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90354256] [2021-06-05 13:42:09,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:09,244 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 13:42:09,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:09,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90354256] [2021-06-05 13:42:09,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90354256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:09,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74104913] [2021-06-05 13:42:09,244 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 13:42:09,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:42:09,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:09,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:42:09,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:09,324 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 13:42:09,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74104913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:09,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:09,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 13:42:09,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234448711] [2021-06-05 13:42:09,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:42:09,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:09,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:42:09,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:09,325 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 13:42:09,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:09,479 INFO L93 Difference]: Finished difference Result 14007 states and 38649 transitions. [2021-06-05 13:42:09,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:42:09,479 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 13:42:09,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:09,498 INFO L225 Difference]: With dead ends: 14007 [2021-06-05 13:42:09,498 INFO L226 Difference]: Without dead ends: 13986 [2021-06-05 13:42:09,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13986 states. [2021-06-05 13:42:09,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13986 to 13395. [2021-06-05 13:42:09,665 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 13:42:09,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13395 states to 13395 states and 37421 transitions. [2021-06-05 13:42:09,774 INFO L78 Accepts]: Start accepts. Automaton has 13395 states and 37421 transitions. Word has length 35 [2021-06-05 13:42:09,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:09,774 INFO L482 AbstractCegarLoop]: Abstraction has 13395 states and 37421 transitions. [2021-06-05 13:42:09,774 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 13:42:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 13395 states and 37421 transitions. [2021-06-05 13:42:09,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:09,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:09,779 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 13:42:09,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:09,980 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:09,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:09,980 INFO L82 PathProgramCache]: Analyzing trace with hash -463341054, now seen corresponding path program 22 times [2021-06-05 13:42:09,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:09,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797401576] [2021-06-05 13:42:09,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:10,027 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 13:42:10,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:10,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797401576] [2021-06-05 13:42:10,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797401576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:10,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242897921] [2021-06-05 13:42:10,028 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) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:10,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:10,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:10,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:42:10,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:10,109 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 13:42:10,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242897921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:10,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:10,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 13:42:10,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350583886] [2021-06-05 13:42:10,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:10,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:10,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:10,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:10,110 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 13:42:10,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:10,278 INFO L93 Difference]: Finished difference Result 13987 states and 38480 transitions. [2021-06-05 13:42:10,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:42:10,279 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 13:42:10,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:10,299 INFO L225 Difference]: With dead ends: 13987 [2021-06-05 13:42:10,299 INFO L226 Difference]: Without dead ends: 13963 [2021-06-05 13:42:10,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:10,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13963 states. [2021-06-05 13:42:10,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13963 to 12486. [2021-06-05 13:42:10,455 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 13:42:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12486 states to 12486 states and 34893 transitions. [2021-06-05 13:42:10,477 INFO L78 Accepts]: Start accepts. Automaton has 12486 states and 34893 transitions. Word has length 35 [2021-06-05 13:42:10,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:10,477 INFO L482 AbstractCegarLoop]: Abstraction has 12486 states and 34893 transitions. [2021-06-05 13:42:10,477 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 13:42:10,477 INFO L276 IsEmpty]: Start isEmpty. Operand 12486 states and 34893 transitions. [2021-06-05 13:42:10,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:10,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:10,482 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 13:42:10,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 13:42:10,682 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:10,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:10,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1841063629, now seen corresponding path program 23 times [2021-06-05 13:42:10,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:10,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154016757] [2021-06-05 13:42:10,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:10,747 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 13:42:10,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:10,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154016757] [2021-06-05 13:42:10,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154016757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:10,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578234686] [2021-06-05 13:42:10,747 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 13:42:10,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 13:42:10,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:10,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:42:10,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:10,865 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 13:42:10,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578234686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:10,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:10,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:42:10,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475436419] [2021-06-05 13:42:10,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:10,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:10,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:10,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:10,867 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 13:42:11,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:11,157 INFO L93 Difference]: Finished difference Result 12918 states and 35022 transitions. [2021-06-05 13:42:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:11,157 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 13:42:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:11,175 INFO L225 Difference]: With dead ends: 12918 [2021-06-05 13:42:11,175 INFO L226 Difference]: Without dead ends: 12852 [2021-06-05 13:42:11,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:42:11,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12852 states. [2021-06-05 13:42:11,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12852 to 9736. [2021-06-05 13:42:11,316 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 13:42:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9736 states to 9736 states and 27132 transitions. [2021-06-05 13:42:11,333 INFO L78 Accepts]: Start accepts. Automaton has 9736 states and 27132 transitions. Word has length 35 [2021-06-05 13:42:11,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:11,333 INFO L482 AbstractCegarLoop]: Abstraction has 9736 states and 27132 transitions. [2021-06-05 13:42:11,333 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 13:42:11,333 INFO L276 IsEmpty]: Start isEmpty. Operand 9736 states and 27132 transitions. [2021-06-05 13:42:11,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:11,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:11,337 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 13:42:11,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:11,538 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:11,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:11,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1454460952, now seen corresponding path program 24 times [2021-06-05 13:42:11,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:11,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637975762] [2021-06-05 13:42:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:11,604 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 13:42:11,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:11,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637975762] [2021-06-05 13:42:11,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637975762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:11,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818887175] [2021-06-05 13:42:11,605 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 13:42:11,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:42:11,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:11,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:42:11,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:11,691 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 13:42:11,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818887175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:11,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:11,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:42:11,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967181568] [2021-06-05 13:42:11,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:11,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:11,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:11,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:11,692 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 13:42:11,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:11,870 INFO L93 Difference]: Finished difference Result 10128 states and 27807 transitions. [2021-06-05 13:42:11,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:11,871 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 13:42:11,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:11,883 INFO L225 Difference]: With dead ends: 10128 [2021-06-05 13:42:11,884 INFO L226 Difference]: Without dead ends: 10101 [2021-06-05 13:42:11,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:11,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10101 states. [2021-06-05 13:42:11,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10101 to 9757. [2021-06-05 13:42:11,994 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 13:42:12,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9757 states to 9757 states and 27131 transitions. [2021-06-05 13:42:12,009 INFO L78 Accepts]: Start accepts. Automaton has 9757 states and 27131 transitions. Word has length 35 [2021-06-05 13:42:12,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:12,010 INFO L482 AbstractCegarLoop]: Abstraction has 9757 states and 27131 transitions. [2021-06-05 13:42:12,010 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 13:42:12,010 INFO L276 IsEmpty]: Start isEmpty. Operand 9757 states and 27131 transitions. [2021-06-05 13:42:12,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:12,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:12,013 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 13:42:12,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 13:42:12,229 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:12,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:12,229 INFO L82 PathProgramCache]: Analyzing trace with hash -208710795, now seen corresponding path program 12 times [2021-06-05 13:42:12,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:12,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187538549] [2021-06-05 13:42:12,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:12,287 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 13:42:12,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:12,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187538549] [2021-06-05 13:42:12,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187538549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:12,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913697992] [2021-06-05 13:42:12,287 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 13:42:12,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:42:12,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:12,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:42:12,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:12,379 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 13:42:12,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913697992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:12,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:12,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:42:12,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515628034] [2021-06-05 13:42:12,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:12,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:12,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:12,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:12,380 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 13:42:12,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:12,646 INFO L93 Difference]: Finished difference Result 10449 states and 28483 transitions. [2021-06-05 13:42:12,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:12,646 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 13:42:12,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:12,660 INFO L225 Difference]: With dead ends: 10449 [2021-06-05 13:42:12,660 INFO L226 Difference]: Without dead ends: 10431 [2021-06-05 13:42:12,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:42:12,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10431 states. [2021-06-05 13:42:12,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10431 to 9155. [2021-06-05 13:42:12,770 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 13:42:12,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9155 states to 9155 states and 25602 transitions. [2021-06-05 13:42:12,786 INFO L78 Accepts]: Start accepts. Automaton has 9155 states and 25602 transitions. Word has length 35 [2021-06-05 13:42:12,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:12,786 INFO L482 AbstractCegarLoop]: Abstraction has 9155 states and 25602 transitions. [2021-06-05 13:42:12,786 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 13:42:12,786 INFO L276 IsEmpty]: Start isEmpty. Operand 9155 states and 25602 transitions. [2021-06-05 13:42:12,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:12,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:12,790 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 13:42:12,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 13:42:12,999 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:12,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:12,999 INFO L82 PathProgramCache]: Analyzing trace with hash -305893054, now seen corresponding path program 25 times [2021-06-05 13:42:12,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:12,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105397140] [2021-06-05 13:42:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:13,006 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 13:42:13,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:13,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105397140] [2021-06-05 13:42:13,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105397140] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:42:13,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:42:13,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:42:13,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514223011] [2021-06-05 13:42:13,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:42:13,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:13,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:42:13,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:42:13,008 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 13:42:13,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:13,018 INFO L93 Difference]: Finished difference Result 2349 states and 5506 transitions. [2021-06-05 13:42:13,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:42:13,018 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 13:42:13,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:13,020 INFO L225 Difference]: With dead ends: 2349 [2021-06-05 13:42:13,020 INFO L226 Difference]: Without dead ends: 2331 [2021-06-05 13:42:13,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:42:13,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-05 13:42:13,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1380. [2021-06-05 13:42:13,037 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 13:42:13,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3219 transitions. [2021-06-05 13:42:13,040 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3219 transitions. Word has length 35 [2021-06-05 13:42:13,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:13,040 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 3219 transitions. [2021-06-05 13:42:13,040 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 13:42:13,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3219 transitions. [2021-06-05 13:42:13,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:13,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:13,042 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 13:42:13,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-06-05 13:42:13,042 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:13,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:13,042 INFO L82 PathProgramCache]: Analyzing trace with hash -385601739, now seen corresponding path program 26 times [2021-06-05 13:42:13,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:13,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399451071] [2021-06-05 13:42:13,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:13,131 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 13:42:13,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:13,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399451071] [2021-06-05 13:42:13,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399451071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:13,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668999713] [2021-06-05 13:42:13,133 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 13:42:13,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:13,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:13,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:42:13,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:13,284 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 13:42:13,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668999713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:13,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:13,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 13:42:13,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623762737] [2021-06-05 13:42:13,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:13,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:13,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:13,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:13,285 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 13:42:13,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:13,545 INFO L93 Difference]: Finished difference Result 1429 states and 3294 transitions. [2021-06-05 13:42:13,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:42:13,546 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 13:42:13,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:13,547 INFO L225 Difference]: With dead ends: 1429 [2021-06-05 13:42:13,547 INFO L226 Difference]: Without dead ends: 1397 [2021-06-05 13:42:13,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:13,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-06-05 13:42:13,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1380. [2021-06-05 13:42:13,561 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 13:42:13,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3213 transitions. [2021-06-05 13:42:13,564 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3213 transitions. Word has length 35 [2021-06-05 13:42:13,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:13,564 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 3213 transitions. [2021-06-05 13:42:13,564 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 13:42:13,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3213 transitions. [2021-06-05 13:42:13,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:13,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:13,566 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 13:42:13,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 13:42:13,781 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:13,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:13,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1551170986, now seen corresponding path program 27 times [2021-06-05 13:42:13,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:13,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261334683] [2021-06-05 13:42:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:13,835 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 13:42:13,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:13,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261334683] [2021-06-05 13:42:13,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261334683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:13,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237951401] [2021-06-05 13:42:13,836 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 13:42:13,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:42:13,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:13,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:42:13,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:13,931 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 13:42:13,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237951401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:13,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:13,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 13:42:13,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324830652] [2021-06-05 13:42:13,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:13,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:13,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:13,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:13,932 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 13:42:14,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:14,090 INFO L93 Difference]: Finished difference Result 2071 states and 4706 transitions. [2021-06-05 13:42:14,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:42:14,091 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 13:42:14,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:14,093 INFO L225 Difference]: With dead ends: 2071 [2021-06-05 13:42:14,093 INFO L226 Difference]: Without dead ends: 2071 [2021-06-05 13:42:14,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:14,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-05 13:42:14,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1527. [2021-06-05 13:42:14,109 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 13:42:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 3666 transitions. [2021-06-05 13:42:14,112 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 3666 transitions. Word has length 35 [2021-06-05 13:42:14,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:14,112 INFO L482 AbstractCegarLoop]: Abstraction has 1527 states and 3666 transitions. [2021-06-05 13:42:14,112 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 13:42:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 3666 transitions. [2021-06-05 13:42:14,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:14,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:14,113 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 13:42:14,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:14,334 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:14,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:14,334 INFO L82 PathProgramCache]: Analyzing trace with hash 780335319, now seen corresponding path program 13 times [2021-06-05 13:42:14,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:14,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712485623] [2021-06-05 13:42:14,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:14,399 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 13:42:14,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:14,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712485623] [2021-06-05 13:42:14,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712485623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:14,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34689536] [2021-06-05 13:42:14,400 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 13:42:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:14,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:42:14,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:14,495 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 13:42:14,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34689536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:14,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:14,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:42:14,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642583332] [2021-06-05 13:42:14,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:14,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:14,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:14,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:14,496 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 13:42:14,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:14,711 INFO L93 Difference]: Finished difference Result 1909 states and 4411 transitions. [2021-06-05 13:42:14,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:14,712 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 13:42:14,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:14,714 INFO L225 Difference]: With dead ends: 1909 [2021-06-05 13:42:14,714 INFO L226 Difference]: Without dead ends: 1905 [2021-06-05 13:42:14,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:14,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2021-06-05 13:42:14,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1526. [2021-06-05 13:42:14,725 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 13:42:14,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 3665 transitions. [2021-06-05 13:42:14,726 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 3665 transitions. Word has length 35 [2021-06-05 13:42:14,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:14,727 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 3665 transitions. [2021-06-05 13:42:14,727 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 13:42:14,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 3665 transitions. [2021-06-05 13:42:14,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:14,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:14,728 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 13:42:14,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:14,928 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:14,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:14,928 INFO L82 PathProgramCache]: Analyzing trace with hash -852961065, now seen corresponding path program 28 times [2021-06-05 13:42:14,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:14,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447067466] [2021-06-05 13:42:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:14,993 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 13:42:14,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:14,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447067466] [2021-06-05 13:42:14,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447067466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:14,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248100815] [2021-06-05 13:42:14,994 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 13:42:15,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:15,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:15,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:42:15,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:15,131 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 13:42:15,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248100815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:15,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:15,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 13:42:15,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844127633] [2021-06-05 13:42:15,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:15,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:15,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:15,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:15,132 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 13:42:15,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:15,321 INFO L93 Difference]: Finished difference Result 1563 states and 3719 transitions. [2021-06-05 13:42:15,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:42:15,321 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 13:42:15,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:15,323 INFO L225 Difference]: With dead ends: 1563 [2021-06-05 13:42:15,323 INFO L226 Difference]: Without dead ends: 1543 [2021-06-05 13:42:15,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:15,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-06-05 13:42:15,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1526. [2021-06-05 13:42:15,339 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 13:42:15,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 3662 transitions. [2021-06-05 13:42:15,341 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 3662 transitions. Word has length 35 [2021-06-05 13:42:15,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:15,341 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 3662 transitions. [2021-06-05 13:42:15,341 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 13:42:15,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 3662 transitions. [2021-06-05 13:42:15,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:15,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:15,343 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 13:42:15,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 13:42:15,564 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:15,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:15,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1273583998, now seen corresponding path program 29 times [2021-06-05 13:42:15,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:15,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878746223] [2021-06-05 13:42:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:15,608 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 13:42:15,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:15,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878746223] [2021-06-05 13:42:15,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878746223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:15,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601891407] [2021-06-05 13:42:15,609 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 13:42:15,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:42:15,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:15,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:42:15,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:15,702 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 13:42:15,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601891407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:15,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:15,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 9 [2021-06-05 13:42:15,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143302856] [2021-06-05 13:42:15,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:15,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:15,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:15,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:15,703 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 13:42:15,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:15,828 INFO L93 Difference]: Finished difference Result 2415 states and 5508 transitions. [2021-06-05 13:42:15,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:42:15,829 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 13:42:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:15,831 INFO L225 Difference]: With dead ends: 2415 [2021-06-05 13:42:15,831 INFO L226 Difference]: Without dead ends: 2415 [2021-06-05 13:42:15,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:15,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-06-05 13:42:15,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1653. [2021-06-05 13:42:15,846 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 13:42:15,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 4043 transitions. [2021-06-05 13:42:15,848 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 4043 transitions. Word has length 35 [2021-06-05 13:42:15,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:15,848 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 4043 transitions. [2021-06-05 13:42:15,848 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 13:42:15,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 4043 transitions. [2021-06-05 13:42:15,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:15,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:15,849 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 13:42:16,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:16,050 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:16,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:16,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1511645515, now seen corresponding path program 14 times [2021-06-05 13:42:16,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:16,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269049395] [2021-06-05 13:42:16,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:16,113 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 13:42:16,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:16,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269049395] [2021-06-05 13:42:16,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269049395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:16,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559875031] [2021-06-05 13:42:16,114 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 13:42:16,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:16,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:16,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:42:16,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:16,195 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 13:42:16,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559875031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:16,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:16,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:42:16,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444452504] [2021-06-05 13:42:16,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:16,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:16,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:16,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:16,197 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 13:42:16,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:16,421 INFO L93 Difference]: Finished difference Result 2638 states and 6132 transitions. [2021-06-05 13:42:16,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:16,422 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 13:42:16,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:16,424 INFO L225 Difference]: With dead ends: 2638 [2021-06-05 13:42:16,424 INFO L226 Difference]: Without dead ends: 2596 [2021-06-05 13:42:16,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:16,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-06-05 13:42:16,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1819. [2021-06-05 13:42:16,441 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 13:42:16,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 4471 transitions. [2021-06-05 13:42:16,443 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 4471 transitions. Word has length 35 [2021-06-05 13:42:16,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:16,443 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 4471 transitions. [2021-06-05 13:42:16,443 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 13:42:16,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 4471 transitions. [2021-06-05 13:42:16,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:16,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:16,445 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 13:42:16,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:16,645 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:16,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:16,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1229624924, now seen corresponding path program 30 times [2021-06-05 13:42:16,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:16,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740398738] [2021-06-05 13:42:16,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:16,696 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 13:42:16,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:16,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740398738] [2021-06-05 13:42:16,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740398738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:16,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175231789] [2021-06-05 13:42:16,696 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 13:42:16,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:42:16,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:16,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:42:16,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:16,794 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 13:42:16,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175231789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:16,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:16,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 13:42:16,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491651851] [2021-06-05 13:42:16,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:42:16,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:16,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:42:16,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:16,796 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 13:42:16,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:16,905 INFO L93 Difference]: Finished difference Result 2408 states and 5562 transitions. [2021-06-05 13:42:16,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:42:16,905 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 13:42:16,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:16,908 INFO L225 Difference]: With dead ends: 2408 [2021-06-05 13:42:16,908 INFO L226 Difference]: Without dead ends: 2405 [2021-06-05 13:42:16,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:16,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-06-05 13:42:16,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1818. [2021-06-05 13:42:16,924 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 13:42:16,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 4466 transitions. [2021-06-05 13:42:16,926 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 4466 transitions. Word has length 35 [2021-06-05 13:42:16,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:16,926 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 4466 transitions. [2021-06-05 13:42:16,926 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 13:42:16,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 4466 transitions. [2021-06-05 13:42:16,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:16,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:16,927 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 13:42:17,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:17,128 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:17,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:17,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1436687490, now seen corresponding path program 31 times [2021-06-05 13:42:17,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:17,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577495046] [2021-06-05 13:42:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:17,174 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 13:42:17,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:17,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577495046] [2021-06-05 13:42:17,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577495046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:17,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776726619] [2021-06-05 13:42:17,175 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 13:42:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:17,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:42:17,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:17,259 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 13:42:17,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776726619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:17,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:17,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 13:42:17,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959907995] [2021-06-05 13:42:17,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:42:17,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:17,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:42:17,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:17,260 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 13:42:17,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:17,345 INFO L93 Difference]: Finished difference Result 2608 states and 6106 transitions. [2021-06-05 13:42:17,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:42:17,345 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 13:42:17,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:17,347 INFO L225 Difference]: With dead ends: 2608 [2021-06-05 13:42:17,347 INFO L226 Difference]: Without dead ends: 2596 [2021-06-05 13:42:17,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:17,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-06-05 13:42:17,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1953. [2021-06-05 13:42:17,365 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 13:42:17,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 4797 transitions. [2021-06-05 13:42:17,368 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 4797 transitions. Word has length 35 [2021-06-05 13:42:17,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:17,368 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 4797 transitions. [2021-06-05 13:42:17,368 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 13:42:17,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 4797 transitions. [2021-06-05 13:42:17,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:17,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:17,369 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 13:42:17,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:17,570 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:17,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:17,570 INFO L82 PathProgramCache]: Analyzing trace with hash -11312523, now seen corresponding path program 32 times [2021-06-05 13:42:17,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:17,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011704841] [2021-06-05 13:42:17,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:17,620 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 13:42:17,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:17,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011704841] [2021-06-05 13:42:17,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011704841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:17,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942398979] [2021-06-05 13:42:17,621 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 13:42:17,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:17,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:17,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:42:17,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:17,725 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 13:42:17,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942398979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:17,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:17,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 13:42:17,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711454758] [2021-06-05 13:42:17,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:42:17,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:17,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:42:17,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:17,726 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 13:42:17,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:17,944 INFO L93 Difference]: Finished difference Result 2377 states and 5580 transitions. [2021-06-05 13:42:17,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:17,945 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 13:42:17,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:17,947 INFO L225 Difference]: With dead ends: 2377 [2021-06-05 13:42:17,947 INFO L226 Difference]: Without dead ends: 2298 [2021-06-05 13:42:17,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:17,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-06-05 13:42:17,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2023. [2021-06-05 13:42:17,964 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 13:42:17,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 4937 transitions. [2021-06-05 13:42:17,967 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 4937 transitions. Word has length 35 [2021-06-05 13:42:17,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:17,967 INFO L482 AbstractCegarLoop]: Abstraction has 2023 states and 4937 transitions. [2021-06-05 13:42:17,967 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 13:42:17,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 4937 transitions. [2021-06-05 13:42:17,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:17,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:17,968 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 13:42:18,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 13:42:18,169 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:18,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:18,169 INFO L82 PathProgramCache]: Analyzing trace with hash -624848703, now seen corresponding path program 33 times [2021-06-05 13:42:18,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:18,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771069592] [2021-06-05 13:42:18,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:18,233 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 13:42:18,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:18,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771069592] [2021-06-05 13:42:18,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771069592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:18,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615634823] [2021-06-05 13:42:18,233 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 13:42:18,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:42:18,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:18,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:42:18,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:18,323 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 13:42:18,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615634823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:18,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:18,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:42:18,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715564527] [2021-06-05 13:42:18,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:42:18,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:18,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:42:18,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:18,324 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 13:42:18,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:18,474 INFO L93 Difference]: Finished difference Result 2392 states and 5647 transitions. [2021-06-05 13:42:18,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:18,474 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 13:42:18,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:18,477 INFO L225 Difference]: With dead ends: 2392 [2021-06-05 13:42:18,477 INFO L226 Difference]: Without dead ends: 2380 [2021-06-05 13:42:18,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:18,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-06-05 13:42:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2025. [2021-06-05 13:42:18,494 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 13:42:18,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 4941 transitions. [2021-06-05 13:42:18,496 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 4941 transitions. Word has length 35 [2021-06-05 13:42:18,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:18,496 INFO L482 AbstractCegarLoop]: Abstraction has 2025 states and 4941 transitions. [2021-06-05 13:42:18,496 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 13:42:18,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 4941 transitions. [2021-06-05 13:42:18,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:18,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:18,498 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 13:42:18,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:18,701 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:18,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:18,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1517068631, now seen corresponding path program 34 times [2021-06-05 13:42:18,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:18,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036941681] [2021-06-05 13:42:18,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:18,757 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 13:42:18,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:18,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036941681] [2021-06-05 13:42:18,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036941681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:18,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222625655] [2021-06-05 13:42:18,757 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 13:42:18,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:18,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:18,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:42:18,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:18,867 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 13:42:18,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222625655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:18,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:18,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:42:18,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021859411] [2021-06-05 13:42:18,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:18,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:18,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:18,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:18,868 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 13:42:19,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:19,155 INFO L93 Difference]: Finished difference Result 3056 states and 7043 transitions. [2021-06-05 13:42:19,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:42:19,155 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 13:42:19,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:19,158 INFO L225 Difference]: With dead ends: 3056 [2021-06-05 13:42:19,158 INFO L226 Difference]: Without dead ends: 3002 [2021-06-05 13:42:19,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:42:19,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-06-05 13:42:19,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 2084. [2021-06-05 13:42:19,181 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 13:42:19,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 5095 transitions. [2021-06-05 13:42:19,183 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 5095 transitions. Word has length 35 [2021-06-05 13:42:19,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:19,184 INFO L482 AbstractCegarLoop]: Abstraction has 2084 states and 5095 transitions. [2021-06-05 13:42:19,184 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 13:42:19,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 5095 transitions. [2021-06-05 13:42:19,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:19,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:19,185 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 13:42:19,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:19,386 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:19,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:19,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1245339556, now seen corresponding path program 35 times [2021-06-05 13:42:19,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:19,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106427053] [2021-06-05 13:42:19,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:19,434 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 13:42:19,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:19,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106427053] [2021-06-05 13:42:19,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106427053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:19,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559544567] [2021-06-05 13:42:19,435 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 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 13:42:19,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:42:19,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:19,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:42:19,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:19,537 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 13:42:19,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559544567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:19,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:19,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-05 13:42:19,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317995058] [2021-06-05 13:42:19,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:42:19,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:19,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:42:19,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:19,538 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 13:42:19,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:19,661 INFO L93 Difference]: Finished difference Result 2889 states and 6691 transitions. [2021-06-05 13:42:19,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:42:19,661 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 13:42:19,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:19,664 INFO L225 Difference]: With dead ends: 2889 [2021-06-05 13:42:19,664 INFO L226 Difference]: Without dead ends: 2865 [2021-06-05 13:42:19,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:19,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2021-06-05 13:42:19,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2164. [2021-06-05 13:42:19,682 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 13:42:19,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 5338 transitions. [2021-06-05 13:42:19,684 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 5338 transitions. Word has length 35 [2021-06-05 13:42:19,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:19,684 INFO L482 AbstractCegarLoop]: Abstraction has 2164 states and 5338 transitions. [2021-06-05 13:42:19,684 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 13:42:19,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 5338 transitions. [2021-06-05 13:42:19,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:19,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:19,686 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 13:42:19,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 13:42:19,887 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:19,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:19,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1671905165, now seen corresponding path program 36 times [2021-06-05 13:42:19,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:19,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606663126] [2021-06-05 13:42:19,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:19,955 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 13:42:19,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:19,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606663126] [2021-06-05 13:42:19,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606663126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:19,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527378638] [2021-06-05 13:42:19,955 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 13:42:19,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:42:19,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:19,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:42:19,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:20,048 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 13:42:20,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527378638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:20,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:20,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:42:20,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478990615] [2021-06-05 13:42:20,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:20,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:20,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:20,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:20,049 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 13:42:20,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:20,518 INFO L93 Difference]: Finished difference Result 3794 states and 8733 transitions. [2021-06-05 13:42:20,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:42:20,519 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 13:42:20,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:20,522 INFO L225 Difference]: With dead ends: 3794 [2021-06-05 13:42:20,523 INFO L226 Difference]: Without dead ends: 3680 [2021-06-05 13:42:20,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 264.1ms TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:42:20,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2021-06-05 13:42:20,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 2276. [2021-06-05 13:42:20,544 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 13:42:20,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5629 transitions. [2021-06-05 13:42:20,546 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5629 transitions. Word has length 35 [2021-06-05 13:42:20,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:20,546 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 5629 transitions. [2021-06-05 13:42:20,546 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 13:42:20,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5629 transitions. [2021-06-05 13:42:20,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:20,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:20,548 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 13:42:20,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:20,748 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:20,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:20,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2058507842, now seen corresponding path program 37 times [2021-06-05 13:42:20,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:20,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583892971] [2021-06-05 13:42:20,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:20,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:20,812 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 13:42:20,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:20,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583892971] [2021-06-05 13:42:20,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583892971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:20,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998195446] [2021-06-05 13:42:20,813 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 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 13:42:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:20,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:42:20,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:20,910 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 13:42:20,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998195446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:20,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:20,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:42:20,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050163903] [2021-06-05 13:42:20,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:20,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:20,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:20,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:20,911 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 13:42:21,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:21,040 INFO L93 Difference]: Finished difference Result 2985 states and 6922 transitions. [2021-06-05 13:42:21,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:42:21,040 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 13:42:21,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:21,043 INFO L225 Difference]: With dead ends: 2985 [2021-06-05 13:42:21,043 INFO L226 Difference]: Without dead ends: 2949 [2021-06-05 13:42:21,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:21,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-06-05 13:42:21,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2276. [2021-06-05 13:42:21,067 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 13:42:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5625 transitions. [2021-06-05 13:42:21,071 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5625 transitions. Word has length 35 [2021-06-05 13:42:21,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:21,071 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 5625 transitions. [2021-06-05 13:42:21,071 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 13:42:21,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5625 transitions. [2021-06-05 13:42:21,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:21,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:21,072 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 13:42:21,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:21,274 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:21,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:21,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1612213655, now seen corresponding path program 38 times [2021-06-05 13:42:21,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:21,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269589608] [2021-06-05 13:42:21,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:21,337 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 13:42:21,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:21,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269589608] [2021-06-05 13:42:21,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269589608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:21,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658178114] [2021-06-05 13:42:21,337 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 13:42:21,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:21,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:21,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:42:21,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:21,435 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 13:42:21,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658178114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:21,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:21,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:42:21,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793286008] [2021-06-05 13:42:21,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:42:21,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:21,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:42:21,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:21,436 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 13:42:21,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:21,687 INFO L93 Difference]: Finished difference Result 3037 states and 7074 transitions. [2021-06-05 13:42:21,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:42:21,688 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 13:42:21,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:21,690 INFO L225 Difference]: With dead ends: 3037 [2021-06-05 13:42:21,690 INFO L226 Difference]: Without dead ends: 2881 [2021-06-05 13:42:21,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:42:21,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2021-06-05 13:42:21,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 2074. [2021-06-05 13:42:21,707 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 13:42:21,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 5096 transitions. [2021-06-05 13:42:21,710 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 5096 transitions. Word has length 35 [2021-06-05 13:42:21,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:21,710 INFO L482 AbstractCegarLoop]: Abstraction has 2074 states and 5096 transitions. [2021-06-05 13:42:21,710 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 13:42:21,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 5096 transitions. [2021-06-05 13:42:21,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:21,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:21,711 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 13:42:21,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:21,913 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:21,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:21,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1374152138, now seen corresponding path program 15 times [2021-06-05 13:42:21,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:21,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111371166] [2021-06-05 13:42:21,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:21,964 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 13:42:21,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:21,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111371166] [2021-06-05 13:42:21,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111371166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:21,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852676522] [2021-06-05 13:42:21,965 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 13:42:21,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:42:21,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:21,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:42:21,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:22,043 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 13:42:22,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852676522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:22,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:22,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-06-05 13:42:22,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420989765] [2021-06-05 13:42:22,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:22,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:22,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:22,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:22,044 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 13:42:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:22,211 INFO L93 Difference]: Finished difference Result 2850 states and 6708 transitions. [2021-06-05 13:42:22,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:22,212 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 13:42:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:22,214 INFO L225 Difference]: With dead ends: 2850 [2021-06-05 13:42:22,214 INFO L226 Difference]: Without dead ends: 2832 [2021-06-05 13:42:22,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:22,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-05 13:42:22,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2298. [2021-06-05 13:42:22,233 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 13:42:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 5720 transitions. [2021-06-05 13:42:22,235 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 5720 transitions. Word has length 35 [2021-06-05 13:42:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:22,235 INFO L482 AbstractCegarLoop]: Abstraction has 2298 states and 5720 transitions. [2021-06-05 13:42:22,235 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 13:42:22,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 5720 transitions. [2021-06-05 13:42:22,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:22,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:22,237 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 13:42:22,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-05 13:42:22,438 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:22,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:22,438 INFO L82 PathProgramCache]: Analyzing trace with hash 752271728, now seen corresponding path program 16 times [2021-06-05 13:42:22,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:22,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670426256] [2021-06-05 13:42:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:22,485 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 13:42:22,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:22,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670426256] [2021-06-05 13:42:22,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670426256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:22,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134617660] [2021-06-05 13:42:22,485 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 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 13:42:22,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:22,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:22,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:42:22,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:22,597 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 13:42:22,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134617660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:22,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:22,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-06-05 13:42:22,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068587192] [2021-06-05 13:42:22,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:22,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:22,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:22,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:22,599 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 13:42:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:22,836 INFO L93 Difference]: Finished difference Result 2847 states and 6724 transitions. [2021-06-05 13:42:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:42:22,837 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 13:42:22,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:22,839 INFO L225 Difference]: With dead ends: 2847 [2021-06-05 13:42:22,839 INFO L226 Difference]: Without dead ends: 2847 [2021-06-05 13:42:22,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:42:22,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-06-05 13:42:22,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2179. [2021-06-05 13:42:22,857 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 13:42:22,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 5385 transitions. [2021-06-05 13:42:22,859 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 5385 transitions. Word has length 35 [2021-06-05 13:42:22,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:22,859 INFO L482 AbstractCegarLoop]: Abstraction has 2179 states and 5385 transitions. [2021-06-05 13:42:22,859 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 13:42:22,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 5385 transitions. [2021-06-05 13:42:22,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:22,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:22,861 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 13:42:23,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:23,062 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:23,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:23,062 INFO L82 PathProgramCache]: Analyzing trace with hash -789180772, now seen corresponding path program 39 times [2021-06-05 13:42:23,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:23,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609214354] [2021-06-05 13:42:23,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:23,131 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 13:42:23,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:23,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609214354] [2021-06-05 13:42:23,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609214354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:23,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645967628] [2021-06-05 13:42:23,131 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 13:42:23,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:42:23,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:23,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:42:23,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:23,223 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 13:42:23,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645967628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:23,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:23,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 13:42:23,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598946951] [2021-06-05 13:42:23,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:42:23,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:23,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:42:23,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:23,224 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 13:42:23,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:23,363 INFO L93 Difference]: Finished difference Result 2663 states and 6272 transitions. [2021-06-05 13:42:23,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:42:23,363 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 13:42:23,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:23,366 INFO L225 Difference]: With dead ends: 2663 [2021-06-05 13:42:23,366 INFO L226 Difference]: Without dead ends: 2616 [2021-06-05 13:42:23,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:23,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-06-05 13:42:23,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2188. [2021-06-05 13:42:23,387 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 13:42:23,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 5399 transitions. [2021-06-05 13:42:23,390 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 5399 transitions. Word has length 35 [2021-06-05 13:42:23,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:23,391 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 5399 transitions. [2021-06-05 13:42:23,391 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 13:42:23,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 5399 transitions. [2021-06-05 13:42:23,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:23,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:23,393 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 13:42:23,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:23,593 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:23,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:23,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1018494725, now seen corresponding path program 40 times [2021-06-05 13:42:23,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:23,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690116189] [2021-06-05 13:42:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:23,641 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 13:42:23,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:23,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690116189] [2021-06-05 13:42:23,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690116189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:23,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033700943] [2021-06-05 13:42:23,641 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 13:42:23,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:23,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:23,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:42:23,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:23,835 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 13:42:23,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033700943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:23,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:23,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 16 [2021-06-05 13:42:23,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807288241] [2021-06-05 13:42:23,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:42:23,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:23,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:42:23,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:42:23,836 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 13:42:24,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:24,591 INFO L93 Difference]: Finished difference Result 3588 states and 8244 transitions. [2021-06-05 13:42:24,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:42:24,592 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 13:42:24,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:24,595 INFO L225 Difference]: With dead ends: 3588 [2021-06-05 13:42:24,595 INFO L226 Difference]: Without dead ends: 3550 [2021-06-05 13:42:24,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 424.0ms TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 13:42:24,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2021-06-05 13:42:24,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2578. [2021-06-05 13:42:24,618 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 13:42:24,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 6275 transitions. [2021-06-05 13:42:24,621 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 6275 transitions. Word has length 38 [2021-06-05 13:42:24,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:24,621 INFO L482 AbstractCegarLoop]: Abstraction has 2578 states and 6275 transitions. [2021-06-05 13:42:24,621 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 13:42:24,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 6275 transitions. [2021-06-05 13:42:24,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:24,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:24,623 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 13:42:24,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:24,825 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:24,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:24,826 INFO L82 PathProgramCache]: Analyzing trace with hash 988310311, now seen corresponding path program 41 times [2021-06-05 13:42:24,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:24,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092629323] [2021-06-05 13:42:24,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:24,869 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 13:42:24,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:24,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092629323] [2021-06-05 13:42:24,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092629323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:24,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280824539] [2021-06-05 13:42:24,869 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 13:42:24,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 13:42:24,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:24,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:42:24,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:24,947 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 13:42:24,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280824539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:24,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:24,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 13:42:24,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301929347] [2021-06-05 13:42:24,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:42:24,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:24,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:42:24,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:42:24,948 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 13:42:25,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:25,085 INFO L93 Difference]: Finished difference Result 3224 states and 7683 transitions. [2021-06-05 13:42:25,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:42:25,096 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 13:42:25,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:25,099 INFO L225 Difference]: With dead ends: 3224 [2021-06-05 13:42:25,099 INFO L226 Difference]: Without dead ends: 3189 [2021-06-05 13:42:25,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:42:25,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-06-05 13:42:25,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 2741. [2021-06-05 13:42:25,121 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 13:42:25,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 6733 transitions. [2021-06-05 13:42:25,124 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 6733 transitions. Word has length 38 [2021-06-05 13:42:25,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:25,124 INFO L482 AbstractCegarLoop]: Abstraction has 2741 states and 6733 transitions. [2021-06-05 13:42:25,124 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 13:42:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 6733 transitions. [2021-06-05 13:42:25,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:25,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:25,126 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 13:42:25,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 13:42:25,327 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:25,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:25,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1650028221, now seen corresponding path program 42 times [2021-06-05 13:42:25,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:25,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895492239] [2021-06-05 13:42:25,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:25,369 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 13:42:25,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:25,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895492239] [2021-06-05 13:42:25,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895492239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:25,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575536769] [2021-06-05 13:42:25,369 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 13:42:25,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 13:42:25,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:25,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:42:25,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:25,533 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 13:42:25,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575536769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:25,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:25,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 13:42:25,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70499186] [2021-06-05 13:42:25,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:25,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:25,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:25,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:25,534 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 13:42:26,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:26,023 INFO L93 Difference]: Finished difference Result 4464 states and 10129 transitions. [2021-06-05 13:42:26,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:42:26,023 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 13:42:26,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:26,027 INFO L225 Difference]: With dead ends: 4464 [2021-06-05 13:42:26,027 INFO L226 Difference]: Without dead ends: 4401 [2021-06-05 13:42:26,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:42:26,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-06-05 13:42:26,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 2892. [2021-06-05 13:42:26,054 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 13:42:26,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 7166 transitions. [2021-06-05 13:42:26,057 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 7166 transitions. Word has length 38 [2021-06-05 13:42:26,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:26,058 INFO L482 AbstractCegarLoop]: Abstraction has 2892 states and 7166 transitions. [2021-06-05 13:42:26,058 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 13:42:26,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 7166 transitions. [2021-06-05 13:42:26,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:26,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:26,060 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 13:42:26,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:26,260 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:26,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:26,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1035175619, now seen corresponding path program 43 times [2021-06-05 13:42:26,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:26,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351923847] [2021-06-05 13:42:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:26,300 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 13:42:26,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:26,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351923847] [2021-06-05 13:42:26,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351923847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:26,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438160064] [2021-06-05 13:42:26,300 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 13:42:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:26,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:42:26,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:26,374 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 13:42:26,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438160064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:26,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:26,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 13:42:26,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870386716] [2021-06-05 13:42:26,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:42:26,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:26,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:42:26,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:42:26,375 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 13:42:26,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:26,511 INFO L93 Difference]: Finished difference Result 3617 states and 8704 transitions. [2021-06-05 13:42:26,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:42:26,511 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 13:42:26,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:26,514 INFO L225 Difference]: With dead ends: 3617 [2021-06-05 13:42:26,514 INFO L226 Difference]: Without dead ends: 3592 [2021-06-05 13:42:26,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:42:26,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2021-06-05 13:42:26,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 3175. [2021-06-05 13:42:26,538 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 13:42:26,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 7839 transitions. [2021-06-05 13:42:26,541 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 7839 transitions. Word has length 38 [2021-06-05 13:42:26,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:26,541 INFO L482 AbstractCegarLoop]: Abstraction has 3175 states and 7839 transitions. [2021-06-05 13:42:26,541 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 13:42:26,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 7839 transitions. [2021-06-05 13:42:26,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:26,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:26,543 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 13:42:26,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-06-05 13:42:26,745 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:26,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:26,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1350282616, now seen corresponding path program 17 times [2021-06-05 13:42:26,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:26,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683074887] [2021-06-05 13:42:26,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:26,853 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 13:42:26,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:26,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683074887] [2021-06-05 13:42:26,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683074887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:26,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363616962] [2021-06-05 13:42:26,854 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 13:42:26,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:42:26,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:26,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:26,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:26,946 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 13:42:26,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363616962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:26,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:26,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:42:26,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062461280] [2021-06-05 13:42:26,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:26,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:26,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:26,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:26,947 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 13:42:27,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:27,418 INFO L93 Difference]: Finished difference Result 4225 states and 9893 transitions. [2021-06-05 13:42:27,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:42:27,418 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 13:42:27,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:27,423 INFO L225 Difference]: With dead ends: 4225 [2021-06-05 13:42:27,423 INFO L226 Difference]: Without dead ends: 4189 [2021-06-05 13:42:27,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 240.3ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:42:27,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2021-06-05 13:42:27,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 3084. [2021-06-05 13:42:27,448 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 13:42:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 7646 transitions. [2021-06-05 13:42:27,452 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 7646 transitions. Word has length 41 [2021-06-05 13:42:27,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:27,452 INFO L482 AbstractCegarLoop]: Abstraction has 3084 states and 7646 transitions. [2021-06-05 13:42:27,452 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 13:42:27,452 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 7646 transitions. [2021-06-05 13:42:27,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:27,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:27,455 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 13:42:27,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:27,655 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:27,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:27,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1492128392, now seen corresponding path program 44 times [2021-06-05 13:42:27,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:27,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288620444] [2021-06-05 13:42:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:27,767 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 13:42:27,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:27,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288620444] [2021-06-05 13:42:27,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288620444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:27,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193181563] [2021-06-05 13:42:27,767 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 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 13:42:27,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:27,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:27,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:27,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:27,969 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 13:42:27,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193181563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:27,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:27,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 13:42:27,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897732079] [2021-06-05 13:42:27,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:42:27,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:27,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:42:27,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:42:27,970 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 13:42:28,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:28,527 INFO L93 Difference]: Finished difference Result 3304 states and 7993 transitions. [2021-06-05 13:42:28,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:28,527 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 13:42:28,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:28,530 INFO L225 Difference]: With dead ends: 3304 [2021-06-05 13:42:28,531 INFO L226 Difference]: Without dead ends: 3236 [2021-06-05 13:42:28,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 168.6ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:42:28,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-05 13:42:28,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3084. [2021-06-05 13:42:28,557 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 13:42:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 7630 transitions. [2021-06-05 13:42:28,561 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 7630 transitions. Word has length 41 [2021-06-05 13:42:28,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:28,561 INFO L482 AbstractCegarLoop]: Abstraction has 3084 states and 7630 transitions. [2021-06-05 13:42:28,561 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 13:42:28,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 7630 transitions. [2021-06-05 13:42:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:28,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:28,563 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 13:42:28,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-05 13:42:28,764 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:28,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:28,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1073103992, now seen corresponding path program 45 times [2021-06-05 13:42:28,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:28,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520487262] [2021-06-05 13:42:28,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:28,832 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 13:42:28,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:28,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520487262] [2021-06-05 13:42:28,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520487262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:28,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607908901] [2021-06-05 13:42:28,832 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 13:42:28,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 13:42:28,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:28,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:28,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:28,921 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 13:42:28,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607908901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:28,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:28,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:42:28,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926139943] [2021-06-05 13:42:28,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:28,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:28,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:28,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:28,921 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 13:42:29,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:29,125 INFO L93 Difference]: Finished difference Result 3450 states and 8325 transitions. [2021-06-05 13:42:29,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:29,126 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 13:42:29,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:29,129 INFO L225 Difference]: With dead ends: 3450 [2021-06-05 13:42:29,129 INFO L226 Difference]: Without dead ends: 3450 [2021-06-05 13:42:29,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:29,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3450 states. [2021-06-05 13:42:29,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3450 to 3096. [2021-06-05 13:42:29,157 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 13:42:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 7667 transitions. [2021-06-05 13:42:29,161 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 7667 transitions. Word has length 41 [2021-06-05 13:42:29,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:29,161 INFO L482 AbstractCegarLoop]: Abstraction has 3096 states and 7667 transitions. [2021-06-05 13:42:29,161 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 13:42:29,161 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 7667 transitions. [2021-06-05 13:42:29,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:29,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:29,163 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 13:42:29,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 13:42:29,364 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:29,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:29,364 INFO L82 PathProgramCache]: Analyzing trace with hash 665060437, now seen corresponding path program 18 times [2021-06-05 13:42:29,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:29,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688502280] [2021-06-05 13:42:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:29,449 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 13:42:29,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:29,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688502280] [2021-06-05 13:42:29,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688502280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:29,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507444184] [2021-06-05 13:42:29,450 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 13:42:29,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:42:29,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:29,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:29,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:29,589 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 13:42:29,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507444184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:29,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:29,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2021-06-05 13:42:29,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833125941] [2021-06-05 13:42:29,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:42:29,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:29,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:42:29,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:29,590 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 13:42:29,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:29,818 INFO L93 Difference]: Finished difference Result 4321 states and 10236 transitions. [2021-06-05 13:42:29,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:42:29,819 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 13:42:29,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:29,823 INFO L225 Difference]: With dead ends: 4321 [2021-06-05 13:42:29,823 INFO L226 Difference]: Without dead ends: 4263 [2021-06-05 13:42:29,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 146.0ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:42:29,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4263 states. [2021-06-05 13:42:29,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4263 to 3240. [2021-06-05 13:42:29,853 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 13:42:29,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3240 states to 3240 states and 8066 transitions. [2021-06-05 13:42:29,856 INFO L78 Accepts]: Start accepts. Automaton has 3240 states and 8066 transitions. Word has length 41 [2021-06-05 13:42:29,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:29,856 INFO L482 AbstractCegarLoop]: Abstraction has 3240 states and 8066 transitions. [2021-06-05 13:42:29,857 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 13:42:29,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3240 states and 8066 transitions. [2021-06-05 13:42:29,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:29,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:29,859 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 13:42:30,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 13:42:30,059 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:30,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:30,060 INFO L82 PathProgramCache]: Analyzing trace with hash 9364347, now seen corresponding path program 19 times [2021-06-05 13:42:30,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:30,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751720272] [2021-06-05 13:42:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:30,113 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 13:42:30,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:30,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751720272] [2021-06-05 13:42:30,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751720272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:30,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478770800] [2021-06-05 13:42:30,113 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 13:42:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:30,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:30,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:30,228 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 13:42:30,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478770800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:30,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:30,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-05 13:42:30,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581601599] [2021-06-05 13:42:30,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:30,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:30,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:30,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:30,230 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 13:42:30,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:30,386 INFO L93 Difference]: Finished difference Result 4797 states and 11528 transitions. [2021-06-05 13:42:30,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:42:30,386 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 13:42:30,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:30,393 INFO L225 Difference]: With dead ends: 4797 [2021-06-05 13:42:30,393 INFO L226 Difference]: Without dead ends: 4797 [2021-06-05 13:42:30,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:30,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-06-05 13:42:30,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 3486. [2021-06-05 13:42:30,451 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 13:42:30,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 8805 transitions. [2021-06-05 13:42:30,458 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 8805 transitions. Word has length 41 [2021-06-05 13:42:30,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:30,459 INFO L482 AbstractCegarLoop]: Abstraction has 3486 states and 8805 transitions. [2021-06-05 13:42:30,459 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 13:42:30,459 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 8805 transitions. [2021-06-05 13:42:30,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:30,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:30,463 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 13:42:30,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:30,669 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:30,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:30,669 INFO L82 PathProgramCache]: Analyzing trace with hash -524501029, now seen corresponding path program 46 times [2021-06-05 13:42:30,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:30,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554335398] [2021-06-05 13:42:30,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:30,716 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 13:42:30,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:30,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554335398] [2021-06-05 13:42:30,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554335398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:30,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982801932] [2021-06-05 13:42:30,717 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 13:42:30,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:30,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:30,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:30,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:30,813 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 13:42:30,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982801932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:30,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:30,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 13:42:30,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119292324] [2021-06-05 13:42:30,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:30,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:30,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:30,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:30,814 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 13:42:30,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:30,933 INFO L93 Difference]: Finished difference Result 3733 states and 9242 transitions. [2021-06-05 13:42:30,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:42:30,933 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 13:42:30,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:30,937 INFO L225 Difference]: With dead ends: 3733 [2021-06-05 13:42:30,937 INFO L226 Difference]: Without dead ends: 3727 [2021-06-05 13:42:30,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:30,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2021-06-05 13:42:30,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3447. [2021-06-05 13:42:30,966 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 13:42:30,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 8682 transitions. [2021-06-05 13:42:30,970 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 8682 transitions. Word has length 41 [2021-06-05 13:42:30,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:30,970 INFO L482 AbstractCegarLoop]: Abstraction has 3447 states and 8682 transitions. [2021-06-05 13:42:30,970 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 13:42:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 8682 transitions. [2021-06-05 13:42:30,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:30,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:30,973 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 13:42:31,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-06-05 13:42:31,173 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:31,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:31,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1583917210, now seen corresponding path program 20 times [2021-06-05 13:42:31,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:31,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880001396] [2021-06-05 13:42:31,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:31,238 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 13:42:31,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:31,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880001396] [2021-06-05 13:42:31,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880001396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:31,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688524557] [2021-06-05 13:42:31,238 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 13:42:31,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:31,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:31,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:31,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:31,324 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 13:42:31,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688524557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:31,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:31,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:42:31,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487678120] [2021-06-05 13:42:31,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:31,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:31,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:31,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:31,325 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 13:42:31,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:31,553 INFO L93 Difference]: Finished difference Result 4309 states and 10396 transitions. [2021-06-05 13:42:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:31,553 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 13:42:31,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:31,557 INFO L225 Difference]: With dead ends: 4309 [2021-06-05 13:42:31,558 INFO L226 Difference]: Without dead ends: 4278 [2021-06-05 13:42:31,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:31,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2021-06-05 13:42:31,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 3497. [2021-06-05 13:42:31,596 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 13:42:31,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3497 states to 3497 states and 8796 transitions. [2021-06-05 13:42:31,601 INFO L78 Accepts]: Start accepts. Automaton has 3497 states and 8796 transitions. Word has length 41 [2021-06-05 13:42:31,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:31,601 INFO L482 AbstractCegarLoop]: Abstraction has 3497 states and 8796 transitions. [2021-06-05 13:42:31,601 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 13:42:31,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3497 states and 8796 transitions. [2021-06-05 13:42:31,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:31,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:31,604 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 13:42:31,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:31,806 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:31,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:31,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1157353229, now seen corresponding path program 47 times [2021-06-05 13:42:31,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:31,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291514932] [2021-06-05 13:42:31,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:31,848 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 13:42:31,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:31,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291514932] [2021-06-05 13:42:31,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291514932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:31,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831962661] [2021-06-05 13:42:31,849 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 13:42:31,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:42:31,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:31,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:31,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:31,964 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 13:42:31,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831962661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:31,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:31,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 11 [2021-06-05 13:42:31,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892469991] [2021-06-05 13:42:31,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:31,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:31,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:31,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:31,965 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 13:42:32,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:32,143 INFO L93 Difference]: Finished difference Result 4421 states and 10653 transitions. [2021-06-05 13:42:32,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:32,143 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 13:42:32,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:32,148 INFO L225 Difference]: With dead ends: 4421 [2021-06-05 13:42:32,148 INFO L226 Difference]: Without dead ends: 4412 [2021-06-05 13:42:32,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4412 states. [2021-06-05 13:42:32,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4412 to 3587. [2021-06-05 13:42:32,185 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 13:42:32,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 9077 transitions. [2021-06-05 13:42:32,190 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 9077 transitions. Word has length 41 [2021-06-05 13:42:32,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:32,190 INFO L482 AbstractCegarLoop]: Abstraction has 3587 states and 9077 transitions. [2021-06-05 13:42:32,190 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 13:42:32,190 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 9077 transitions. [2021-06-05 13:42:32,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:32,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:32,193 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 13:42:32,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 13:42:32,394 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:32,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:32,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1364415795, now seen corresponding path program 48 times [2021-06-05 13:42:32,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:32,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752663893] [2021-06-05 13:42:32,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:32,439 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 13:42:32,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:32,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752663893] [2021-06-05 13:42:32,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752663893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:32,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985769831] [2021-06-05 13:42:32,439 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 13:42:32,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:42:32,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:32,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:32,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:32,523 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 13:42:32,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985769831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:32,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:32,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 13:42:32,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861612027] [2021-06-05 13:42:32,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:32,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:32,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:32,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:32,524 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 13:42:32,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:32,677 INFO L93 Difference]: Finished difference Result 4253 states and 10263 transitions. [2021-06-05 13:42:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:42:32,677 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 13:42:32,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:32,682 INFO L225 Difference]: With dead ends: 4253 [2021-06-05 13:42:32,682 INFO L226 Difference]: Without dead ends: 4235 [2021-06-05 13:42:32,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:32,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-06-05 13:42:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 3587. [2021-06-05 13:42:32,728 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 13:42:32,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 9067 transitions. [2021-06-05 13:42:32,734 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 9067 transitions. Word has length 41 [2021-06-05 13:42:32,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:32,734 INFO L482 AbstractCegarLoop]: Abstraction has 3587 states and 9067 transitions. [2021-06-05 13:42:32,734 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 13:42:32,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 9067 transitions. [2021-06-05 13:42:32,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:32,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:32,739 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 13:42:32,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 13:42:32,961 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:32,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:32,961 INFO L82 PathProgramCache]: Analyzing trace with hash -83584218, now seen corresponding path program 49 times [2021-06-05 13:42:32,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:32,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640339500] [2021-06-05 13:42:32,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:33,030 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 13:42:33,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:33,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640339500] [2021-06-05 13:42:33,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640339500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:33,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848677901] [2021-06-05 13:42:33,033 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 13:42:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:33,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:33,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:33,155 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 13:42:33,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848677901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:33,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:33,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:42:33,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217171164] [2021-06-05 13:42:33,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:33,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:33,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:33,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:33,158 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 13:42:33,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:33,542 INFO L93 Difference]: Finished difference Result 4054 states and 9921 transitions. [2021-06-05 13:42:33,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:33,542 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 13:42:33,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:33,546 INFO L225 Difference]: With dead ends: 4054 [2021-06-05 13:42:33,546 INFO L226 Difference]: Without dead ends: 4016 [2021-06-05 13:42:33,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 95.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:33,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4016 states. [2021-06-05 13:42:33,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4016 to 3593. [2021-06-05 13:42:33,576 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 13:42:33,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 9070 transitions. [2021-06-05 13:42:33,582 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 9070 transitions. Word has length 41 [2021-06-05 13:42:33,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:33,582 INFO L482 AbstractCegarLoop]: Abstraction has 3593 states and 9070 transitions. [2021-06-05 13:42:33,582 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 13:42:33,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 9070 transitions. [2021-06-05 13:42:33,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:33,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:33,585 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 13:42:33,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 13:42:33,789 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:33,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:33,789 INFO L82 PathProgramCache]: Analyzing trace with hash -697120398, now seen corresponding path program 50 times [2021-06-05 13:42:33,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:33,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990781794] [2021-06-05 13:42:33,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:33,855 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 13:42:33,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:33,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990781794] [2021-06-05 13:42:33,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990781794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:33,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260127709] [2021-06-05 13:42:33,855 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 13:42:33,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:33,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:33,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:33,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:33,941 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 13:42:33,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260127709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:33,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:33,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:42:33,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817194028] [2021-06-05 13:42:33,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:33,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:33,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:33,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:33,943 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 13:42:34,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:34,205 INFO L93 Difference]: Finished difference Result 4259 states and 10390 transitions. [2021-06-05 13:42:34,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:34,205 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 13:42:34,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:34,211 INFO L225 Difference]: With dead ends: 4259 [2021-06-05 13:42:34,211 INFO L226 Difference]: Without dead ends: 4247 [2021-06-05 13:42:34,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:34,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-06-05 13:42:34,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3595. [2021-06-05 13:42:34,253 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 13:42:34,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3595 states to 3595 states and 9072 transitions. [2021-06-05 13:42:34,259 INFO L78 Accepts]: Start accepts. Automaton has 3595 states and 9072 transitions. Word has length 41 [2021-06-05 13:42:34,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:34,259 INFO L482 AbstractCegarLoop]: Abstraction has 3595 states and 9072 transitions. [2021-06-05 13:42:34,259 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 13:42:34,259 INFO L276 IsEmpty]: Start isEmpty. Operand 3595 states and 9072 transitions. [2021-06-05 13:42:34,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:34,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:34,264 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 13:42:34,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:34,481 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:34,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:34,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1444796936, now seen corresponding path program 51 times [2021-06-05 13:42:34,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:34,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131852119] [2021-06-05 13:42:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:34,542 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 13:42:34,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:34,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131852119] [2021-06-05 13:42:34,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131852119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:34,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315963519] [2021-06-05 13:42:34,542 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 13:42:34,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 13:42:34,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:34,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:34,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:34,635 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 13:42:34,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315963519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:34,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:34,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:42:34,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40857705] [2021-06-05 13:42:34,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:34,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:34,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:34,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:34,636 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 13:42:34,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:34,933 INFO L93 Difference]: Finished difference Result 4613 states and 11146 transitions. [2021-06-05 13:42:34,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:42:34,934 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 13:42:34,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:34,938 INFO L225 Difference]: With dead ends: 4613 [2021-06-05 13:42:34,938 INFO L226 Difference]: Without dead ends: 4601 [2021-06-05 13:42:34,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:42:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-06-05 13:42:34,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 3620. [2021-06-05 13:42:34,973 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 13:42:34,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 9131 transitions. [2021-06-05 13:42:34,977 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 9131 transitions. Word has length 41 [2021-06-05 13:42:34,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:34,977 INFO L482 AbstractCegarLoop]: Abstraction has 3620 states and 9131 transitions. [2021-06-05 13:42:34,977 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 13:42:34,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 9131 transitions. [2021-06-05 13:42:34,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:34,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:34,980 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 13:42:35,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:35,181 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:35,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:35,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1206735419, now seen corresponding path program 21 times [2021-06-05 13:42:35,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:35,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939302984] [2021-06-05 13:42:35,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:35,225 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 13:42:35,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:35,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939302984] [2021-06-05 13:42:35,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939302984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:35,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186436713] [2021-06-05 13:42:35,225 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 13:42:35,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:42:35,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:35,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:35,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:35,382 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 13:42:35,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186436713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:35,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:35,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-05 13:42:35,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805335062] [2021-06-05 13:42:35,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:35,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:35,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:35,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:35,382 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 13:42:35,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:35,520 INFO L93 Difference]: Finished difference Result 4855 states and 11693 transitions. [2021-06-05 13:42:35,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:35,521 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 13:42:35,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:35,526 INFO L225 Difference]: With dead ends: 4855 [2021-06-05 13:42:35,526 INFO L226 Difference]: Without dead ends: 4847 [2021-06-05 13:42:35,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:35,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4847 states. [2021-06-05 13:42:35,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4847 to 3739. [2021-06-05 13:42:35,566 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 13:42:35,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 9486 transitions. [2021-06-05 13:42:35,571 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 9486 transitions. Word has length 41 [2021-06-05 13:42:35,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:35,571 INFO L482 AbstractCegarLoop]: Abstraction has 3739 states and 9486 transitions. [2021-06-05 13:42:35,572 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 13:42:35,572 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 9486 transitions. [2021-06-05 13:42:35,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:35,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:35,575 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 13:42:35,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:35,776 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:35,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:35,776 INFO L82 PathProgramCache]: Analyzing trace with hash 584855009, now seen corresponding path program 22 times [2021-06-05 13:42:35,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:35,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948996542] [2021-06-05 13:42:35,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:35,828 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 13:42:35,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:35,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948996542] [2021-06-05 13:42:35,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948996542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:35,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659385210] [2021-06-05 13:42:35,828 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 13:42:35,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:35,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:35,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:35,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:35,941 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 13:42:35,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659385210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:35,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:35,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-05 13:42:35,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660280240] [2021-06-05 13:42:35,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:35,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:35,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:35,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:35,942 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 13:42:36,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:36,096 INFO L93 Difference]: Finished difference Result 5507 states and 13181 transitions. [2021-06-05 13:42:36,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:36,096 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 13:42:36,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:36,102 INFO L225 Difference]: With dead ends: 5507 [2021-06-05 13:42:36,102 INFO L226 Difference]: Without dead ends: 5507 [2021-06-05 13:42:36,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:36,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2021-06-05 13:42:36,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 3748. [2021-06-05 13:42:36,142 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 13:42:36,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 9506 transitions. [2021-06-05 13:42:36,147 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 9506 transitions. Word has length 41 [2021-06-05 13:42:36,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:36,147 INFO L482 AbstractCegarLoop]: Abstraction has 3748 states and 9506 transitions. [2021-06-05 13:42:36,147 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 13:42:36,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 9506 transitions. [2021-06-05 13:42:36,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:36,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:36,150 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 13:42:36,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 13:42:36,351 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:36,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:36,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1052717447, now seen corresponding path program 23 times [2021-06-05 13:42:36,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:36,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500509459] [2021-06-05 13:42:36,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:36,408 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 13:42:36,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:36,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500509459] [2021-06-05 13:42:36,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500509459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:36,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971124709] [2021-06-05 13:42:36,409 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 13:42:36,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:42:36,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:36,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:36,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:36,547 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 13:42:36,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971124709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:36,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:36,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 15 [2021-06-05 13:42:36,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368325304] [2021-06-05 13:42:36,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:42:36,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:36,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:42:36,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:42:36,548 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 13:42:36,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:36,787 INFO L93 Difference]: Finished difference Result 5032 states and 12054 transitions. [2021-06-05 13:42:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:42:36,787 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 13:42:36,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:36,793 INFO L225 Difference]: With dead ends: 5032 [2021-06-05 13:42:36,793 INFO L226 Difference]: Without dead ends: 5032 [2021-06-05 13:42:36,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:42:36,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5032 states. [2021-06-05 13:42:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5032 to 3584. [2021-06-05 13:42:36,840 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 13:42:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 9035 transitions. [2021-06-05 13:42:36,845 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 9035 transitions. Word has length 41 [2021-06-05 13:42:36,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:36,845 INFO L482 AbstractCegarLoop]: Abstraction has 3584 states and 9035 transitions. [2021-06-05 13:42:36,845 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 13:42:36,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 9035 transitions. [2021-06-05 13:42:36,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:36,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:36,849 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 13:42:37,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 13:42:37,049 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:37,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:37,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1317611251, now seen corresponding path program 52 times [2021-06-05 13:42:37,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:37,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942443890] [2021-06-05 13:42:37,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:37,102 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 13:42:37,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:37,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942443890] [2021-06-05 13:42:37,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942443890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:37,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451795877] [2021-06-05 13:42:37,103 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 13:42:37,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:37,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:37,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:37,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:37,187 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 13:42:37,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451795877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:37,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:37,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:42:37,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132949631] [2021-06-05 13:42:37,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:37,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:37,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:37,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:37,188 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 13:42:37,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:37,371 INFO L93 Difference]: Finished difference Result 4100 states and 9963 transitions. [2021-06-05 13:42:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:37,371 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 13:42:37,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:37,375 INFO L225 Difference]: With dead ends: 4100 [2021-06-05 13:42:37,375 INFO L226 Difference]: Without dead ends: 4082 [2021-06-05 13:42:37,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:37,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-06-05 13:42:37,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3584. [2021-06-05 13:42:37,405 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 13:42:37,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 9030 transitions. [2021-06-05 13:42:37,409 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 9030 transitions. Word has length 41 [2021-06-05 13:42:37,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:37,409 INFO L482 AbstractCegarLoop]: Abstraction has 3584 states and 9030 transitions. [2021-06-05 13:42:37,409 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 13:42:37,410 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 9030 transitions. [2021-06-05 13:42:37,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:37,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:37,412 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 13:42:37,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 13:42:37,613 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:37,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:37,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1869360074, now seen corresponding path program 24 times [2021-06-05 13:42:37,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:37,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141479275] [2021-06-05 13:42:37,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:37,677 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 13:42:37,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:37,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141479275] [2021-06-05 13:42:37,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141479275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:37,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881925243] [2021-06-05 13:42:37,678 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 13:42:37,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 13:42:37,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:37,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:37,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:37,779 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 13:42:37,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881925243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:37,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:37,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:42:37,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270658723] [2021-06-05 13:42:37,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:37,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:37,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:37,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:37,780 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 13:42:38,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:38,023 INFO L93 Difference]: Finished difference Result 4419 states and 10697 transitions. [2021-06-05 13:42:38,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:38,023 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 13:42:38,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:38,027 INFO L225 Difference]: With dead ends: 4419 [2021-06-05 13:42:38,027 INFO L226 Difference]: Without dead ends: 4397 [2021-06-05 13:42:38,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:38,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4397 states. [2021-06-05 13:42:38,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4397 to 3612. [2021-06-05 13:42:38,058 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 13:42:38,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3612 states to 3612 states and 9102 transitions. [2021-06-05 13:42:38,063 INFO L78 Accepts]: Start accepts. Automaton has 3612 states and 9102 transitions. Word has length 41 [2021-06-05 13:42:38,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:38,063 INFO L482 AbstractCegarLoop]: Abstraction has 3612 states and 9102 transitions. [2021-06-05 13:42:38,063 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 13:42:38,063 INFO L276 IsEmpty]: Start isEmpty. Operand 3612 states and 9102 transitions. [2021-06-05 13:42:38,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:38,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:38,066 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 13:42:38,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 13:42:38,266 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:38,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:38,266 INFO L82 PathProgramCache]: Analyzing trace with hash -925274230, now seen corresponding path program 53 times [2021-06-05 13:42:38,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:38,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504660647] [2021-06-05 13:42:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:38,325 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 13:42:38,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:38,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504660647] [2021-06-05 13:42:38,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504660647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:38,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941284454] [2021-06-05 13:42:38,326 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 13:42:38,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 13:42:38,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:38,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:38,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:38,449 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 13:42:38,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941284454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:38,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:38,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:42:38,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020985842] [2021-06-05 13:42:38,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:38,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:38,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:38,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:38,450 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 13:42:38,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:38,826 INFO L93 Difference]: Finished difference Result 4113 states and 10023 transitions. [2021-06-05 13:42:38,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:38,826 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 13:42:38,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:38,830 INFO L225 Difference]: With dead ends: 4113 [2021-06-05 13:42:38,830 INFO L226 Difference]: Without dead ends: 4057 [2021-06-05 13:42:38,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:38,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-06-05 13:42:38,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 3639. [2021-06-05 13:42:38,861 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 13:42:38,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 9148 transitions. [2021-06-05 13:42:38,865 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 9148 transitions. Word has length 41 [2021-06-05 13:42:38,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:38,865 INFO L482 AbstractCegarLoop]: Abstraction has 3639 states and 9148 transitions. [2021-06-05 13:42:38,865 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 13:42:38,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 9148 transitions. [2021-06-05 13:42:38,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:38,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:38,868 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 13:42:39,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:39,069 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:39,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:39,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1538810410, now seen corresponding path program 54 times [2021-06-05 13:42:39,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:39,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611881273] [2021-06-05 13:42:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:39,134 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 13:42:39,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:39,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611881273] [2021-06-05 13:42:39,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611881273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:39,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090983924] [2021-06-05 13:42:39,135 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 13:42:39,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 13:42:39,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:39,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:39,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:39,230 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 13:42:39,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090983924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:39,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:39,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:42:39,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50619363] [2021-06-05 13:42:39,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:39,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:39,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:39,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:39,231 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 13:42:39,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:39,486 INFO L93 Difference]: Finished difference Result 4375 states and 10599 transitions. [2021-06-05 13:42:39,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:39,487 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 13:42:39,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:39,491 INFO L225 Difference]: With dead ends: 4375 [2021-06-05 13:42:39,491 INFO L226 Difference]: Without dead ends: 4363 [2021-06-05 13:42:39,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:39,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-06-05 13:42:39,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3649. [2021-06-05 13:42:39,522 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 13:42:39,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 9168 transitions. [2021-06-05 13:42:39,526 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 9168 transitions. Word has length 41 [2021-06-05 13:42:39,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:39,527 INFO L482 AbstractCegarLoop]: Abstraction has 3649 states and 9168 transitions. [2021-06-05 13:42:39,527 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 13:42:39,527 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 9168 transitions. [2021-06-05 13:42:39,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:39,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:39,529 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 13:42:39,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:39,733 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:39,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:39,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1696109897, now seen corresponding path program 25 times [2021-06-05 13:42:39,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:39,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646382010] [2021-06-05 13:42:39,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:39,777 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 13:42:39,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:39,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646382010] [2021-06-05 13:42:39,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646382010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:39,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989090537] [2021-06-05 13:42:39,778 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 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 13:42:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:39,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:39,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:39,867 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 13:42:39,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989090537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:39,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:39,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-05 13:42:39,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001218403] [2021-06-05 13:42:39,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:39,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:39,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:39,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:39,868 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 13:42:40,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:40,003 INFO L93 Difference]: Finished difference Result 4653 states and 11200 transitions. [2021-06-05 13:42:40,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:40,003 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 13:42:40,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:40,010 INFO L225 Difference]: With dead ends: 4653 [2021-06-05 13:42:40,010 INFO L226 Difference]: Without dead ends: 4643 [2021-06-05 13:42:40,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:40,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4643 states. [2021-06-05 13:42:40,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4643 to 3759. [2021-06-05 13:42:40,057 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 13:42:40,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 9460 transitions. [2021-06-05 13:42:40,062 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 9460 transitions. Word has length 41 [2021-06-05 13:42:40,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:40,062 INFO L482 AbstractCegarLoop]: Abstraction has 3759 states and 9460 transitions. [2021-06-05 13:42:40,062 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 13:42:40,062 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 9460 transitions. [2021-06-05 13:42:40,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:40,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:40,065 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 13:42:40,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:40,266 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:40,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:40,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1107799383, now seen corresponding path program 55 times [2021-06-05 13:42:40,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:40,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192794120] [2021-06-05 13:42:40,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:40,312 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 13:42:40,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:40,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192794120] [2021-06-05 13:42:40,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192794120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:40,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004919321] [2021-06-05 13:42:40,312 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 13:42:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:40,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:40,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:40,398 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 13:42:40,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004919321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:40,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:40,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 13:42:40,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515589090] [2021-06-05 13:42:40,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:40,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:40,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:40,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:40,399 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 13:42:40,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:40,531 INFO L93 Difference]: Finished difference Result 4425 states and 10642 transitions. [2021-06-05 13:42:40,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:42:40,531 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 13:42:40,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:40,535 INFO L225 Difference]: With dead ends: 4425 [2021-06-05 13:42:40,536 INFO L226 Difference]: Without dead ends: 4407 [2021-06-05 13:42:40,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:40,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4407 states. [2021-06-05 13:42:40,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4407 to 3746. [2021-06-05 13:42:40,571 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 13:42:40,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3746 states to 3746 states and 9409 transitions. [2021-06-05 13:42:40,575 INFO L78 Accepts]: Start accepts. Automaton has 3746 states and 9409 transitions. Word has length 41 [2021-06-05 13:42:40,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:40,576 INFO L482 AbstractCegarLoop]: Abstraction has 3746 states and 9409 transitions. [2021-06-05 13:42:40,576 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 13:42:40,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3746 states and 9409 transitions. [2021-06-05 13:42:40,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:40,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:40,579 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 13:42:40,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:40,779 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:40,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:40,779 INFO L82 PathProgramCache]: Analyzing trace with hash 603106924, now seen corresponding path program 56 times [2021-06-05 13:42:40,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:40,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262552844] [2021-06-05 13:42:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:40,838 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 13:42:40,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:40,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262552844] [2021-06-05 13:42:40,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262552844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:40,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036935303] [2021-06-05 13:42:40,838 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 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 13:42:40,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:40,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:40,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:40,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:40,923 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 13:42:40,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036935303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:40,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:40,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:42:40,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440503658] [2021-06-05 13:42:40,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:40,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:40,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:40,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:40,925 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 13:42:41,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:41,294 INFO L93 Difference]: Finished difference Result 5163 states and 12313 transitions. [2021-06-05 13:42:41,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:42:41,294 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 13:42:41,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:41,299 INFO L225 Difference]: With dead ends: 5163 [2021-06-05 13:42:41,299 INFO L226 Difference]: Without dead ends: 5121 [2021-06-05 13:42:41,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:42:41,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5121 states. [2021-06-05 13:42:41,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5121 to 3767. [2021-06-05 13:42:41,340 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 13:42:41,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 9465 transitions. [2021-06-05 13:42:41,345 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 9465 transitions. Word has length 41 [2021-06-05 13:42:41,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:41,345 INFO L482 AbstractCegarLoop]: Abstraction has 3767 states and 9465 transitions. [2021-06-05 13:42:41,345 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 13:42:41,345 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 9465 transitions. [2021-06-05 13:42:41,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:41,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:41,348 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 13:42:41,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 13:42:41,548 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:41,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:41,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2135666033, now seen corresponding path program 57 times [2021-06-05 13:42:41,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:41,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394229986] [2021-06-05 13:42:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:41,602 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 13:42:41,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:41,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394229986] [2021-06-05 13:42:41,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394229986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:41,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148076176] [2021-06-05 13:42:41,602 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 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 13:42:41,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:42:41,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:41,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:41,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:41,694 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 13:42:41,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148076176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:41,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:41,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:42:41,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124973950] [2021-06-05 13:42:41,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:41,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:41,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:41,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:41,695 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 13:42:41,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:41,842 INFO L93 Difference]: Finished difference Result 4453 states and 10682 transitions. [2021-06-05 13:42:41,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:42:41,842 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 13:42:41,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:41,847 INFO L225 Difference]: With dead ends: 4453 [2021-06-05 13:42:41,847 INFO L226 Difference]: Without dead ends: 4429 [2021-06-05 13:42:41,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:41,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4429 states. [2021-06-05 13:42:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4429 to 3631. [2021-06-05 13:42:41,883 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 13:42:41,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 9072 transitions. [2021-06-05 13:42:41,889 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 9072 transitions. Word has length 41 [2021-06-05 13:42:41,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:41,889 INFO L482 AbstractCegarLoop]: Abstraction has 3631 states and 9072 transitions. [2021-06-05 13:42:41,889 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 13:42:41,889 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 9072 transitions. [2021-06-05 13:42:41,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:41,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:41,892 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 13:42:42,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 13:42:42,092 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:42,093 INFO L82 PathProgramCache]: Analyzing trace with hash 757943458, now seen corresponding path program 58 times [2021-06-05 13:42:42,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:42,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778461719] [2021-06-05 13:42:42,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:42,165 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 13:42:42,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:42,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778461719] [2021-06-05 13:42:42,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778461719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:42,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379002737] [2021-06-05 13:42:42,165 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 13:42:42,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:42,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:42,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:42,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:42,251 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 13:42:42,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379002737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:42,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:42,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:42:42,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904753040] [2021-06-05 13:42:42,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:42:42,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:42,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:42:42,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:42,252 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 13:42:42,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:42,596 INFO L93 Difference]: Finished difference Result 4939 states and 11659 transitions. [2021-06-05 13:42:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:42:42,596 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 13:42:42,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:42,601 INFO L225 Difference]: With dead ends: 4939 [2021-06-05 13:42:42,601 INFO L226 Difference]: Without dead ends: 4885 [2021-06-05 13:42:42,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:42:42,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4885 states. [2021-06-05 13:42:42,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4885 to 3618. [2021-06-05 13:42:42,636 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 13:42:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3618 states to 3618 states and 9020 transitions. [2021-06-05 13:42:42,641 INFO L78 Accepts]: Start accepts. Automaton has 3618 states and 9020 transitions. Word has length 41 [2021-06-05 13:42:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:42,641 INFO L482 AbstractCegarLoop]: Abstraction has 3618 states and 9020 transitions. [2021-06-05 13:42:42,641 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 13:42:42,641 INFO L276 IsEmpty]: Start isEmpty. Operand 3618 states and 9020 transitions. [2021-06-05 13:42:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:42,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:42,644 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 13:42:42,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:42,844 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:42,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:42,845 INFO L82 PathProgramCache]: Analyzing trace with hash -101998469, now seen corresponding path program 26 times [2021-06-05 13:42:42,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:42,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671698385] [2021-06-05 13:42:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:42,889 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 13:42:42,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:42,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671698385] [2021-06-05 13:42:42,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671698385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:42,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744454329] [2021-06-05 13:42:42,889 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 13:42:42,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:42,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:42,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:42,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:42,980 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 13:42:42,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744454329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:42,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:42,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-05 13:42:42,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075817900] [2021-06-05 13:42:42,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:42,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:42,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:42,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:42,981 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 13:42:43,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:43,173 INFO L93 Difference]: Finished difference Result 5763 states and 13661 transitions. [2021-06-05 13:42:43,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:43,174 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 13:42:43,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:43,180 INFO L225 Difference]: With dead ends: 5763 [2021-06-05 13:42:43,180 INFO L226 Difference]: Without dead ends: 5763 [2021-06-05 13:42:43,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:43,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5763 states. [2021-06-05 13:42:43,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5763 to 3703. [2021-06-05 13:42:43,231 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 13:42:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 9278 transitions. [2021-06-05 13:42:43,236 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 9278 transitions. Word has length 41 [2021-06-05 13:42:43,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:43,237 INFO L482 AbstractCegarLoop]: Abstraction has 3703 states and 9278 transitions. [2021-06-05 13:42:43,237 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 13:42:43,237 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 9278 transitions. [2021-06-05 13:42:43,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:43,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:43,240 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 13:42:43,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:43,441 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:43,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:43,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1739570925, now seen corresponding path program 27 times [2021-06-05 13:42:43,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:43,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521644516] [2021-06-05 13:42:43,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:43,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:43,500 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 13:42:43,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:43,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521644516] [2021-06-05 13:42:43,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521644516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:43,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333074277] [2021-06-05 13:42:43,501 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 13:42:43,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 13:42:43,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:43,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:43,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:43,598 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 13:42:43,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333074277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:43,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:43,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 13:42:43,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219818075] [2021-06-05 13:42:43,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:42:43,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:43,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:42:43,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:43,599 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 13:42:43,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:43,802 INFO L93 Difference]: Finished difference Result 5686 states and 13483 transitions. [2021-06-05 13:42:43,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:43,802 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 13:42:43,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:43,807 INFO L225 Difference]: With dead ends: 5686 [2021-06-05 13:42:43,808 INFO L226 Difference]: Without dead ends: 5686 [2021-06-05 13:42:43,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:42:43,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-06-05 13:42:43,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3719. [2021-06-05 13:42:43,852 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 13:42:43,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3719 states to 3719 states and 9325 transitions. [2021-06-05 13:42:43,857 INFO L78 Accepts]: Start accepts. Automaton has 3719 states and 9325 transitions. Word has length 41 [2021-06-05 13:42:43,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:43,857 INFO L482 AbstractCegarLoop]: Abstraction has 3719 states and 9325 transitions. [2021-06-05 13:42:43,857 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 13:42:43,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3719 states and 9325 transitions. [2021-06-05 13:42:43,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:43,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:43,860 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 13:42:44,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 13:42:44,061 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:44,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:44,061 INFO L82 PathProgramCache]: Analyzing trace with hash 865401207, now seen corresponding path program 28 times [2021-06-05 13:42:44,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:44,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462660275] [2021-06-05 13:42:44,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:44,125 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 13:42:44,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:44,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462660275] [2021-06-05 13:42:44,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462660275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:44,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029734728] [2021-06-05 13:42:44,126 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 13:42:44,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:44,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:44,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:44,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:44,224 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 13:42:44,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029734728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:44,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:44,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 13:42:44,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135417667] [2021-06-05 13:42:44,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:44,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:44,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:44,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:44,225 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 13:42:44,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:44,433 INFO L93 Difference]: Finished difference Result 4882 states and 11625 transitions. [2021-06-05 13:42:44,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:44,433 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 13:42:44,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:44,438 INFO L225 Difference]: With dead ends: 4882 [2021-06-05 13:42:44,438 INFO L226 Difference]: Without dead ends: 4882 [2021-06-05 13:42:44,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:42:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4882 states. [2021-06-05 13:42:44,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4882 to 3551. [2021-06-05 13:42:44,490 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 13:42:44,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8903 transitions. [2021-06-05 13:42:44,494 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8903 transitions. Word has length 41 [2021-06-05 13:42:44,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:44,494 INFO L482 AbstractCegarLoop]: Abstraction has 3551 states and 8903 transitions. [2021-06-05 13:42:44,494 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 13:42:44,495 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8903 transitions. [2021-06-05 13:42:44,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:44,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:44,497 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 13:42:44,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 13:42:44,698 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:44,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:44,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1144546135, now seen corresponding path program 59 times [2021-06-05 13:42:44,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:44,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62194948] [2021-06-05 13:42:44,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:44,772 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 13:42:44,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:44,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62194948] [2021-06-05 13:42:44,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62194948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:44,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173011334] [2021-06-05 13:42:44,772 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 13:42:44,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:42:44,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:44,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:44,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:44,881 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 13:42:44,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173011334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:44,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:44,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 13 [2021-06-05 13:42:44,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731046305] [2021-06-05 13:42:44,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:44,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:44,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:44,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:44,882 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 13:42:45,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:45,134 INFO L93 Difference]: Finished difference Result 4193 states and 10086 transitions. [2021-06-05 13:42:45,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:42:45,134 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 13:42:45,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:45,139 INFO L225 Difference]: With dead ends: 4193 [2021-06-05 13:42:45,139 INFO L226 Difference]: Without dead ends: 4166 [2021-06-05 13:42:45,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:42:45,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-06-05 13:42:45,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 3551. [2021-06-05 13:42:45,178 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 13:42:45,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8900 transitions. [2021-06-05 13:42:45,183 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8900 transitions. Word has length 41 [2021-06-05 13:42:45,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:45,183 INFO L482 AbstractCegarLoop]: Abstraction has 3551 states and 8900 transitions. [2021-06-05 13:42:45,183 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 13:42:45,183 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8900 transitions. [2021-06-05 13:42:45,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:45,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:45,187 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 13:42:45,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 13:42:45,387 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:45,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:45,387 INFO L82 PathProgramCache]: Analyzing trace with hash -245347661, now seen corresponding path program 60 times [2021-06-05 13:42:45,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:45,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778135949] [2021-06-05 13:42:45,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:45,442 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 13:42:45,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:45,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778135949] [2021-06-05 13:42:45,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778135949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:45,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972449020] [2021-06-05 13:42:45,443 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 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 13:42:45,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 13:42:45,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:45,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:45,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:45,529 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 13:42:45,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972449020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:45,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:45,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 13:42:45,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751953632] [2021-06-05 13:42:45,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:45,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:45,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:45,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:45,530 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 13:42:45,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:45,660 INFO L93 Difference]: Finished difference Result 4381 states and 10397 transitions. [2021-06-05 13:42:45,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:42:45,660 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 13:42:45,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:45,664 INFO L225 Difference]: With dead ends: 4381 [2021-06-05 13:42:45,664 INFO L226 Difference]: Without dead ends: 4363 [2021-06-05 13:42:45,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:45,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-06-05 13:42:45,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3551. [2021-06-05 13:42:45,699 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 13:42:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8882 transitions. [2021-06-05 13:42:45,703 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8882 transitions. Word has length 41 [2021-06-05 13:42:45,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:45,703 INFO L482 AbstractCegarLoop]: Abstraction has 3551 states and 8882 transitions. [2021-06-05 13:42:45,703 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 13:42:45,703 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8882 transitions. [2021-06-05 13:42:45,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:45,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:45,706 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 13:42:45,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:45,907 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:45,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:45,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1693347674, now seen corresponding path program 61 times [2021-06-05 13:42:45,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:45,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536159035] [2021-06-05 13:42:45,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:45,967 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 13:42:45,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:45,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536159035] [2021-06-05 13:42:45,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536159035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:45,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082393696] [2021-06-05 13:42:45,967 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 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 13:42:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:45,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:45,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:46,068 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 13:42:46,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082393696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:46,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:46,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:42:46,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181643818] [2021-06-05 13:42:46,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:46,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:46,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:46,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:46,069 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 13:42:46,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:46,436 INFO L93 Difference]: Finished difference Result 4355 states and 10366 transitions. [2021-06-05 13:42:46,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:46,436 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 13:42:46,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:46,441 INFO L225 Difference]: With dead ends: 4355 [2021-06-05 13:42:46,441 INFO L226 Difference]: Without dead ends: 4156 [2021-06-05 13:42:46,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:46,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2021-06-05 13:42:46,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 3529. [2021-06-05 13:42:46,482 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 13:42:46,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 8764 transitions. [2021-06-05 13:42:46,487 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 8764 transitions. Word has length 41 [2021-06-05 13:42:46,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:46,487 INFO L482 AbstractCegarLoop]: Abstraction has 3529 states and 8764 transitions. [2021-06-05 13:42:46,487 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 13:42:46,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 8764 transitions. [2021-06-05 13:42:46,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:46,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:46,491 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 13:42:46,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 13:42:46,714 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:46,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:46,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1988083442, now seen corresponding path program 62 times [2021-06-05 13:42:46,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:46,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263587462] [2021-06-05 13:42:46,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:46,778 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 13:42:46,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:46,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263587462] [2021-06-05 13:42:46,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263587462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:46,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516225374] [2021-06-05 13:42:46,779 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 13:42:46,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:46,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:46,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:46,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:46,884 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 13:42:46,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516225374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:46,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:46,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:42:46,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467752345] [2021-06-05 13:42:46,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:46,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:46,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:46,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:46,885 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 13:42:47,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:47,160 INFO L93 Difference]: Finished difference Result 4389 states and 10491 transitions. [2021-06-05 13:42:47,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:47,160 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 13:42:47,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:47,164 INFO L225 Difference]: With dead ends: 4389 [2021-06-05 13:42:47,164 INFO L226 Difference]: Without dead ends: 4377 [2021-06-05 13:42:47,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:47,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4377 states. [2021-06-05 13:42:47,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4377 to 3601. [2021-06-05 13:42:47,195 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 13:42:47,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 8935 transitions. [2021-06-05 13:42:47,199 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 8935 transitions. Word has length 41 [2021-06-05 13:42:47,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:47,199 INFO L482 AbstractCegarLoop]: Abstraction has 3601 states and 8935 transitions. [2021-06-05 13:42:47,199 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 13:42:47,199 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 8935 transitions. [2021-06-05 13:42:47,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:47,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:47,202 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 13:42:47,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:47,402 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:47,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:47,403 INFO L82 PathProgramCache]: Analyzing trace with hash -164966520, now seen corresponding path program 63 times [2021-06-05 13:42:47,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:47,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566307881] [2021-06-05 13:42:47,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:47,466 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 13:42:47,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:47,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566307881] [2021-06-05 13:42:47,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566307881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:47,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834092534] [2021-06-05 13:42:47,466 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 13:42:47,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 13:42:47,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:47,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:47,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:47,554 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 13:42:47,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834092534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:47,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:47,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:42:47,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565350886] [2021-06-05 13:42:47,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:47,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:47,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:47,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:47,555 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 13:42:47,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:47,931 INFO L93 Difference]: Finished difference Result 5587 states and 13170 transitions. [2021-06-05 13:42:47,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:42:47,931 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 13:42:47,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:47,936 INFO L225 Difference]: With dead ends: 5587 [2021-06-05 13:42:47,936 INFO L226 Difference]: Without dead ends: 5533 [2021-06-05 13:42:47,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:42:47,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5533 states. [2021-06-05 13:42:47,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5533 to 3793. [2021-06-05 13:42:47,974 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 13:42:47,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 9441 transitions. [2021-06-05 13:42:47,979 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 9441 transitions. Word has length 41 [2021-06-05 13:42:47,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:47,979 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 9441 transitions. [2021-06-05 13:42:47,979 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 13:42:47,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 9441 transitions. [2021-06-05 13:42:47,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:47,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:47,982 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 13:42:48,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 13:42:48,182 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:48,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:48,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1367592589, now seen corresponding path program 64 times [2021-06-05 13:42:48,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:48,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978158519] [2021-06-05 13:42:48,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:48,236 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 13:42:48,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:48,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978158519] [2021-06-05 13:42:48,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978158519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:48,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503695996] [2021-06-05 13:42:48,236 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 13:42:48,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:48,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:48,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:48,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:48,340 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 13:42:48,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503695996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:48,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:48,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:42:48,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14446332] [2021-06-05 13:42:48,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:48,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:48,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:48,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:48,362 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 13:42:48,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:48,504 INFO L93 Difference]: Finished difference Result 4607 states and 10909 transitions. [2021-06-05 13:42:48,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:42:48,504 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 13:42:48,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:48,508 INFO L225 Difference]: With dead ends: 4607 [2021-06-05 13:42:48,508 INFO L226 Difference]: Without dead ends: 4583 [2021-06-05 13:42:48,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:48,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4583 states. [2021-06-05 13:42:48,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4583 to 3793. [2021-06-05 13:42:48,540 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 13:42:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 9425 transitions. [2021-06-05 13:42:48,544 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 9425 transitions. Word has length 41 [2021-06-05 13:42:48,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:48,544 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 9425 transitions. [2021-06-05 13:42:48,544 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 13:42:48,544 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 9425 transitions. [2021-06-05 13:42:48,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:48,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:48,547 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 13:42:48,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 13:42:48,748 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:48,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:48,748 INFO L82 PathProgramCache]: Analyzing trace with hash -10129986, now seen corresponding path program 65 times [2021-06-05 13:42:48,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:48,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109607363] [2021-06-05 13:42:48,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:48,815 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 13:42:48,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:48,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109607363] [2021-06-05 13:42:48,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109607363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:48,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446252810] [2021-06-05 13:42:48,815 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 13:42:48,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 13:42:48,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:48,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:48,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:48,902 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 13:42:48,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446252810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:48,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:48,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:42:48,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379269382] [2021-06-05 13:42:48,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:42:48,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:48,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:42:48,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:48,903 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 13:42:49,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:49,421 INFO L93 Difference]: Finished difference Result 7022 states and 16378 transitions. [2021-06-05 13:42:49,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:42:49,421 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 13:42:49,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:49,427 INFO L225 Difference]: With dead ends: 7022 [2021-06-05 13:42:49,427 INFO L226 Difference]: Without dead ends: 6908 [2021-06-05 13:42:49,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:42:49,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6908 states. [2021-06-05 13:42:49,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6908 to 3954. [2021-06-05 13:42:49,471 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 13:42:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3954 states to 3954 states and 9841 transitions. [2021-06-05 13:42:49,476 INFO L78 Accepts]: Start accepts. Automaton has 3954 states and 9841 transitions. Word has length 41 [2021-06-05 13:42:49,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:49,476 INFO L482 AbstractCegarLoop]: Abstraction has 3954 states and 9841 transitions. [2021-06-05 13:42:49,476 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 13:42:49,476 INFO L276 IsEmpty]: Start isEmpty. Operand 3954 states and 9841 transitions. [2021-06-05 13:42:49,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:49,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:49,479 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 13:42:49,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:49,680 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:49,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:49,680 INFO L82 PathProgramCache]: Analyzing trace with hash 376472691, now seen corresponding path program 66 times [2021-06-05 13:42:49,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:49,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246683986] [2021-06-05 13:42:49,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:49,756 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 13:42:49,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:49,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246683986] [2021-06-05 13:42:49,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246683986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:49,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058998696] [2021-06-05 13:42:49,756 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 13:42:49,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:42:49,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:49,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:49,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:49,841 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 13:42:49,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058998696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:49,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:49,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 13:42:49,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231368955] [2021-06-05 13:42:49,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:42:49,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:49,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:42:49,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:49,842 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 13:42:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:49,998 INFO L93 Difference]: Finished difference Result 4805 states and 11375 transitions. [2021-06-05 13:42:49,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:49,999 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 13:42:49,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:50,003 INFO L225 Difference]: With dead ends: 4805 [2021-06-05 13:42:50,003 INFO L226 Difference]: Without dead ends: 4772 [2021-06-05 13:42:50,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4772 states. [2021-06-05 13:42:50,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4772 to 3796. [2021-06-05 13:42:50,035 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 13:42:50,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 9402 transitions. [2021-06-05 13:42:50,039 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 9402 transitions. Word has length 41 [2021-06-05 13:42:50,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:50,039 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 9402 transitions. [2021-06-05 13:42:50,039 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 13:42:50,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 9402 transitions. [2021-06-05 13:42:50,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:50,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:50,042 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 13:42:50,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable273 [2021-06-05 13:42:50,242 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:50,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:50,242 INFO L82 PathProgramCache]: Analyzing trace with hash -69821496, now seen corresponding path program 67 times [2021-06-05 13:42:50,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:50,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081298503] [2021-06-05 13:42:50,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:50,317 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 13:42:50,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:50,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081298503] [2021-06-05 13:42:50,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081298503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:50,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149599166] [2021-06-05 13:42:50,318 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 13:42:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:50,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:50,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:50,400 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 13:42:50,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149599166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:50,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:50,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:42:50,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720801581] [2021-06-05 13:42:50,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:50,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:50,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:50,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:50,401 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 13:42:50,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:50,786 INFO L93 Difference]: Finished difference Result 5143 states and 11987 transitions. [2021-06-05 13:42:50,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:42:50,787 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 13:42:50,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:50,790 INFO L225 Difference]: With dead ends: 5143 [2021-06-05 13:42:50,791 INFO L226 Difference]: Without dead ends: 4987 [2021-06-05 13:42:50,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:42:50,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4987 states. [2021-06-05 13:42:50,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 3332. [2021-06-05 13:42:50,819 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 13:42:50,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 8120 transitions. [2021-06-05 13:42:50,823 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 8120 transitions. Word has length 41 [2021-06-05 13:42:50,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:50,823 INFO L482 AbstractCegarLoop]: Abstraction has 3332 states and 8120 transitions. [2021-06-05 13:42:50,823 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 13:42:50,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 8120 transitions. [2021-06-05 13:42:50,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:50,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:50,825 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 13:42:51,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 13:42:51,025 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:51,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:51,026 INFO L82 PathProgramCache]: Analyzing trace with hash -307883013, now seen corresponding path program 29 times [2021-06-05 13:42:51,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:51,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946209697] [2021-06-05 13:42:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:51,076 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 13:42:51,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:51,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946209697] [2021-06-05 13:42:51,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946209697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:51,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467832281] [2021-06-05 13:42:51,076 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 13:42:51,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 13:42:51,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:51,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:51,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:51,172 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 13:42:51,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467832281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:51,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:51,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2021-06-05 13:42:51,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908264702] [2021-06-05 13:42:51,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:42:51,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:51,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:42:51,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:51,173 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 13:42:51,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:51,320 INFO L93 Difference]: Finished difference Result 4368 states and 10283 transitions. [2021-06-05 13:42:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:51,321 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 13:42:51,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:51,324 INFO L225 Difference]: With dead ends: 4368 [2021-06-05 13:42:51,324 INFO L226 Difference]: Without dead ends: 4354 [2021-06-05 13:42:51,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:51,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2021-06-05 13:42:51,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 3443. [2021-06-05 13:42:51,352 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 13:42:51,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 8422 transitions. [2021-06-05 13:42:51,356 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 8422 transitions. Word has length 41 [2021-06-05 13:42:51,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:51,356 INFO L482 AbstractCegarLoop]: Abstraction has 3443 states and 8422 transitions. [2021-06-05 13:42:51,356 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 13:42:51,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 8422 transitions. [2021-06-05 13:42:51,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:51,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:51,359 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 13:42:51,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 13:42:51,559 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:51,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:51,559 INFO L82 PathProgramCache]: Analyzing trace with hash -929763423, now seen corresponding path program 30 times [2021-06-05 13:42:51,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:51,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189088472] [2021-06-05 13:42:51,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:51,604 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 13:42:51,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:51,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189088472] [2021-06-05 13:42:51,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189088472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:51,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145586281] [2021-06-05 13:42:51,605 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 13:42:51,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 13:42:51,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:51,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:42:51,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:51,704 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 13:42:51,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145586281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:51,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:51,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-05 13:42:51,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756720676] [2021-06-05 13:42:51,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:42:51,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:51,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:42:51,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:51,705 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 13:42:51,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:51,942 INFO L93 Difference]: Finished difference Result 4338 states and 10163 transitions. [2021-06-05 13:42:51,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:42:51,942 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 13:42:51,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:51,946 INFO L225 Difference]: With dead ends: 4338 [2021-06-05 13:42:51,946 INFO L226 Difference]: Without dead ends: 4338 [2021-06-05 13:42:51,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:42:51,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4338 states. [2021-06-05 13:42:51,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4338 to 3179. [2021-06-05 13:42:51,977 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 13:42:51,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 7751 transitions. [2021-06-05 13:42:51,980 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 7751 transitions. Word has length 41 [2021-06-05 13:42:51,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:51,980 INFO L482 AbstractCegarLoop]: Abstraction has 3179 states and 7751 transitions. [2021-06-05 13:42:51,981 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 13:42:51,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 7751 transitions. [2021-06-05 13:42:51,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:51,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:51,983 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 13:42:52,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:52,183 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:52,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:52,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1823751373, now seen corresponding path program 68 times [2021-06-05 13:42:52,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:52,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203032402] [2021-06-05 13:42:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:52,253 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 13:42:52,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:52,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203032402] [2021-06-05 13:42:52,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203032402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:52,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315363957] [2021-06-05 13:42:52,253 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 13:42:52,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:52,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:52,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:52,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:52,339 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 13:42:52,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315363957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:52,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:52,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:42:52,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551639438] [2021-06-05 13:42:52,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:52,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:52,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:52,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:52,340 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 13:42:52,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:52,526 INFO L93 Difference]: Finished difference Result 3775 states and 8829 transitions. [2021-06-05 13:42:52,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:52,526 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 13:42:52,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:52,530 INFO L225 Difference]: With dead ends: 3775 [2021-06-05 13:42:52,530 INFO L226 Difference]: Without dead ends: 3739 [2021-06-05 13:42:52,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:42:52,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-06-05 13:42:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3188. [2021-06-05 13:42:52,563 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 13:42:52,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 7757 transitions. [2021-06-05 13:42:52,568 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 7757 transitions. Word has length 41 [2021-06-05 13:42:52,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:52,568 INFO L482 AbstractCegarLoop]: Abstraction has 3188 states and 7757 transitions. [2021-06-05 13:42:52,568 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 13:42:52,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 7757 transitions. [2021-06-05 13:42:52,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:52,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:52,570 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 13:42:52,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:52,771 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:52,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:52,771 INFO L82 PathProgramCache]: Analyzing trace with hash 370314101, now seen corresponding path program 69 times [2021-06-05 13:42:52,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:52,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663977166] [2021-06-05 13:42:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:52,857 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 13:42:52,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:52,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663977166] [2021-06-05 13:42:52,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663977166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:52,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417423240] [2021-06-05 13:42:52,857 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 13:42:52,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 13:42:52,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:52,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:52,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:52,949 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 13:42:52,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417423240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:52,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:52,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:42:52,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943477798] [2021-06-05 13:42:52,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:52,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:52,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:52,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:52,950 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 13:42:53,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:53,204 INFO L93 Difference]: Finished difference Result 4138 states and 9762 transitions. [2021-06-05 13:42:53,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:53,204 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 13:42:53,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:53,208 INFO L225 Difference]: With dead ends: 4138 [2021-06-05 13:42:53,208 INFO L226 Difference]: Without dead ends: 4138 [2021-06-05 13:42:53,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:42:53,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2021-06-05 13:42:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 3170. [2021-06-05 13:42:53,238 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 13:42:53,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 7779 transitions. [2021-06-05 13:42:53,242 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 7779 transitions. Word has length 41 [2021-06-05 13:42:53,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:53,242 INFO L482 AbstractCegarLoop]: Abstraction has 3170 states and 7779 transitions. [2021-06-05 13:42:53,242 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 13:42:53,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 7779 transitions. [2021-06-05 13:42:53,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:53,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:53,244 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 13:42:53,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2021-06-05 13:42:53,444 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:53,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1062684898, now seen corresponding path program 31 times [2021-06-05 13:42:53,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:53,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688723670] [2021-06-05 13:42:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:53,520 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 13:42:53,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:53,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688723670] [2021-06-05 13:42:53,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688723670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:53,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667323366] [2021-06-05 13:42:53,521 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 13:42:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:53,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:53,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:53,605 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 13:42:53,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667323366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:53,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:53,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:42:53,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866524033] [2021-06-05 13:42:53,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:53,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:53,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:53,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:53,606 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 13:42:53,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:53,943 INFO L93 Difference]: Finished difference Result 4257 states and 9988 transitions. [2021-06-05 13:42:53,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:42:53,943 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 13:42:53,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:53,948 INFO L225 Difference]: With dead ends: 4257 [2021-06-05 13:42:53,948 INFO L226 Difference]: Without dead ends: 4227 [2021-06-05 13:42:53,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:42:53,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4227 states. [2021-06-05 13:42:53,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4227 to 3157. [2021-06-05 13:42:53,982 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 13:42:53,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 7762 transitions. [2021-06-05 13:42:53,987 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 7762 transitions. Word has length 41 [2021-06-05 13:42:53,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:53,987 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 7762 transitions. [2021-06-05 13:42:53,987 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 13:42:53,987 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 7762 transitions. [2021-06-05 13:42:53,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:53,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:53,990 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 13:42:54,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:54,190 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:54,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:54,190 INFO L82 PathProgramCache]: Analyzing trace with hash 900632802, now seen corresponding path program 70 times [2021-06-05 13:42:54,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:54,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288684873] [2021-06-05 13:42:54,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:54,280 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 13:42:54,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:54,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288684873] [2021-06-05 13:42:54,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288684873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:54,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670073540] [2021-06-05 13:42:54,280 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 13:42:54,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:54,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:54,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:54,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:54,469 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 13:42:54,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670073540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:54,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:54,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 13:42:54,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878811101] [2021-06-05 13:42:54,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:42:54,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:54,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:42:54,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:54,470 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 13:42:54,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:54,829 INFO L93 Difference]: Finished difference Result 3218 states and 7858 transitions. [2021-06-05 13:42:54,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:54,829 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 13:42:54,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:54,833 INFO L225 Difference]: With dead ends: 3218 [2021-06-05 13:42:54,833 INFO L226 Difference]: Without dead ends: 3174 [2021-06-05 13:42:54,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:54,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-06-05 13:42:54,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 3157. [2021-06-05 13:42:54,860 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 13:42:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 7753 transitions. [2021-06-05 13:42:54,864 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 7753 transitions. Word has length 41 [2021-06-05 13:42:54,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:54,864 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 7753 transitions. [2021-06-05 13:42:54,864 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 13:42:54,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 7753 transitions. [2021-06-05 13:42:54,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:54,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:54,866 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 13:42:55,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-06-05 13:42:55,066 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:55,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:55,067 INFO L82 PathProgramCache]: Analyzing trace with hash -514678441, now seen corresponding path program 71 times [2021-06-05 13:42:55,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:55,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880567634] [2021-06-05 13:42:55,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:55,130 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 13:42:55,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:55,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880567634] [2021-06-05 13:42:55,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880567634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:55,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471389900] [2021-06-05 13:42:55,131 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 13:42:55,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 13:42:55,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:55,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:55,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:55,233 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 13:42:55,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471389900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:55,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:55,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 12 [2021-06-05 13:42:55,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818247834] [2021-06-05 13:42:55,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:55,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:55,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:55,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:55,234 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 13:42:55,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:55,457 INFO L93 Difference]: Finished difference Result 4264 states and 10096 transitions. [2021-06-05 13:42:55,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:55,457 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 13:42:55,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:55,461 INFO L225 Difference]: With dead ends: 4264 [2021-06-05 13:42:55,462 INFO L226 Difference]: Without dead ends: 4264 [2021-06-05 13:42:55,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:42:55,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4264 states. [2021-06-05 13:42:55,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4264 to 3336. [2021-06-05 13:42:55,499 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 13:42:55,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 8301 transitions. [2021-06-05 13:42:55,504 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 8301 transitions. Word has length 41 [2021-06-05 13:42:55,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:55,504 INFO L482 AbstractCegarLoop]: Abstraction has 3336 states and 8301 transitions. [2021-06-05 13:42:55,504 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 13:42:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 8301 transitions. [2021-06-05 13:42:55,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:55,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:55,507 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 13:42:55,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:55,707 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:55,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:55,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1038909258, now seen corresponding path program 32 times [2021-06-05 13:42:55,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:55,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596108322] [2021-06-05 13:42:55,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:55,776 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 13:42:55,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:55,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596108322] [2021-06-05 13:42:55,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596108322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:55,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388157435] [2021-06-05 13:42:55,777 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 13:42:55,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:55,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:55,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:55,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:55,882 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 13:42:55,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388157435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:55,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:55,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:42:55,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114408779] [2021-06-05 13:42:55,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:42:55,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:55,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:42:55,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:55,883 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 13:42:56,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:56,205 INFO L93 Difference]: Finished difference Result 4243 states and 10191 transitions. [2021-06-05 13:42:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:42:56,205 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 13:42:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:56,209 INFO L225 Difference]: With dead ends: 4243 [2021-06-05 13:42:56,209 INFO L226 Difference]: Without dead ends: 4243 [2021-06-05 13:42:56,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:42:56,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2021-06-05 13:42:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 3327. [2021-06-05 13:42:56,240 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 13:42:56,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8299 transitions. [2021-06-05 13:42:56,244 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8299 transitions. Word has length 41 [2021-06-05 13:42:56,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:56,244 INFO L482 AbstractCegarLoop]: Abstraction has 3327 states and 8299 transitions. [2021-06-05 13:42:56,244 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 13:42:56,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8299 transitions. [2021-06-05 13:42:56,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:56,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:56,246 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 13:42:56,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:56,447 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:56,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:56,447 INFO L82 PathProgramCache]: Analyzing trace with hash 862018314, now seen corresponding path program 72 times [2021-06-05 13:42:56,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:56,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253991553] [2021-06-05 13:42:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:56,525 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 13:42:56,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:56,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253991553] [2021-06-05 13:42:56,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253991553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:56,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576680489] [2021-06-05 13:42:56,525 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 13:42:56,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:42:56,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:56,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:56,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:56,668 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 13:42:56,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576680489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:56,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:56,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 13:42:56,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378387806] [2021-06-05 13:42:56,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:56,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:56,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:56,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:56,669 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 13:42:56,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:56,974 INFO L93 Difference]: Finished difference Result 3397 states and 8404 transitions. [2021-06-05 13:42:56,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:56,974 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 13:42:56,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:56,977 INFO L225 Difference]: With dead ends: 3397 [2021-06-05 13:42:56,977 INFO L226 Difference]: Without dead ends: 3365 [2021-06-05 13:42:56,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:56,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2021-06-05 13:42:57,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 3327. [2021-06-05 13:42:57,005 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 13:42:57,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8293 transitions. [2021-06-05 13:42:57,009 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8293 transitions. Word has length 41 [2021-06-05 13:42:57,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:57,009 INFO L482 AbstractCegarLoop]: Abstraction has 3327 states and 8293 transitions. [2021-06-05 13:42:57,010 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 13:42:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8293 transitions. [2021-06-05 13:42:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:57,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:57,012 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 13:42:57,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:57,212 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:57,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:57,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1554389111, now seen corresponding path program 33 times [2021-06-05 13:42:57,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:57,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84033796] [2021-06-05 13:42:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:57,274 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 13:42:57,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:57,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84033796] [2021-06-05 13:42:57,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84033796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:57,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916352906] [2021-06-05 13:42:57,274 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 13:42:57,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:42:57,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:57,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:57,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:57,365 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 13:42:57,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916352906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:57,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:57,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 13:42:57,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065310883] [2021-06-05 13:42:57,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:57,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:57,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:57,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:57,365 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 13:42:57,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:57,521 INFO L93 Difference]: Finished difference Result 3937 states and 9522 transitions. [2021-06-05 13:42:57,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:57,522 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 13:42:57,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:57,525 INFO L225 Difference]: With dead ends: 3937 [2021-06-05 13:42:57,525 INFO L226 Difference]: Without dead ends: 3909 [2021-06-05 13:42:57,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:57,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2021-06-05 13:42:57,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 3225. [2021-06-05 13:42:57,553 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 13:42:57,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 8085 transitions. [2021-06-05 13:42:57,557 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 8085 transitions. Word has length 41 [2021-06-05 13:42:57,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:57,557 INFO L482 AbstractCegarLoop]: Abstraction has 3225 states and 8085 transitions. [2021-06-05 13:42:57,557 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 13:42:57,557 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 8085 transitions. [2021-06-05 13:42:57,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:57,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:57,559 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 13:42:57,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:57,760 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:57,760 INFO L82 PathProgramCache]: Analyzing trace with hash -692902219, now seen corresponding path program 73 times [2021-06-05 13:42:57,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:57,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015811487] [2021-06-05 13:42:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:57,814 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 13:42:57,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:57,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015811487] [2021-06-05 13:42:57,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015811487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:57,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126504073] [2021-06-05 13:42:57,814 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 13:42:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:57,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:57,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:57,903 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 13:42:57,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126504073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:57,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:57,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:42:57,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085736840] [2021-06-05 13:42:57,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:57,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:57,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:57,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:57,904 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 13:42:58,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:58,049 INFO L93 Difference]: Finished difference Result 4305 states and 10371 transitions. [2021-06-05 13:42:58,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:42:58,049 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 13:42:58,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:58,054 INFO L225 Difference]: With dead ends: 4305 [2021-06-05 13:42:58,054 INFO L226 Difference]: Without dead ends: 4305 [2021-06-05 13:42:58,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2021-06-05 13:42:58,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 3427. [2021-06-05 13:42:58,088 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 13:42:58,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 8696 transitions. [2021-06-05 13:42:58,092 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 8696 transitions. Word has length 41 [2021-06-05 13:42:58,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:58,093 INFO L482 AbstractCegarLoop]: Abstraction has 3427 states and 8696 transitions. [2021-06-05 13:42:58,093 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 13:42:58,093 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 8696 transitions. [2021-06-05 13:42:58,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:58,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:58,095 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 13:42:58,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 13:42:58,295 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:58,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:58,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1463737886, now seen corresponding path program 34 times [2021-06-05 13:42:58,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:58,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986058176] [2021-06-05 13:42:58,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:58,354 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 13:42:58,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:58,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986058176] [2021-06-05 13:42:58,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986058176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:58,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267047507] [2021-06-05 13:42:58,355 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 13:42:58,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:58,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:58,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:58,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:58,442 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 13:42:58,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267047507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:58,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:58,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:42:58,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230056868] [2021-06-05 13:42:58,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:58,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:58,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:58,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:58,442 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 13:42:58,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:58,703 INFO L93 Difference]: Finished difference Result 4051 states and 9977 transitions. [2021-06-05 13:42:58,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:42:58,703 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 13:42:58,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:58,707 INFO L225 Difference]: With dead ends: 4051 [2021-06-05 13:42:58,707 INFO L226 Difference]: Without dead ends: 4047 [2021-06-05 13:42:58,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:42:58,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2021-06-05 13:42:58,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 3315. [2021-06-05 13:42:58,737 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 13:42:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 8482 transitions. [2021-06-05 13:42:58,741 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 8482 transitions. Word has length 41 [2021-06-05 13:42:58,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:58,741 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 8482 transitions. [2021-06-05 13:42:58,741 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 13:42:58,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 8482 transitions. [2021-06-05 13:42:58,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:58,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:58,743 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 13:42:58,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:58,943 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:58,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:58,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1197933026, now seen corresponding path program 74 times [2021-06-05 13:42:58,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:58,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160769420] [2021-06-05 13:42:58,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:59,007 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 13:42:59,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:59,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160769420] [2021-06-05 13:42:59,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160769420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:59,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169696445] [2021-06-05 13:42:59,007 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 13:42:59,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:59,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:59,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:59,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:59,089 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 13:42:59,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:42:59,091 INFO L628 ElimStorePlain]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 13:42:59,092 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 13:42:59,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:42:59,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:1 [2021-06-05 13:42:59,097 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 13:42:59,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169696445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:59,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:59,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 13:42:59,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284049884] [2021-06-05 13:42:59,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:59,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:59,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:59,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:59,098 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 13:42:59,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:59,218 INFO L93 Difference]: Finished difference Result 3335 states and 8513 transitions. [2021-06-05 13:42:59,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:42:59,218 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 13:42:59,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:59,221 INFO L225 Difference]: With dead ends: 3335 [2021-06-05 13:42:59,221 INFO L226 Difference]: Without dead ends: 3315 [2021-06-05 13:42:59,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:59,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2021-06-05 13:42:59,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 3315. [2021-06-05 13:42:59,246 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 13:42:59,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 8479 transitions. [2021-06-05 13:42:59,250 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 8479 transitions. Word has length 41 [2021-06-05 13:42:59,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:59,250 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 8479 transitions. [2021-06-05 13:42:59,250 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 13:42:59,250 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 8479 transitions. [2021-06-05 13:42:59,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:59,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:59,252 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 13:42:59,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 13:42:59,453 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:59,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:59,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1045836265, now seen corresponding path program 75 times [2021-06-05 13:42:59,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:59,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261395051] [2021-06-05 13:42:59,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:59,509 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 13:42:59,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:59,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261395051] [2021-06-05 13:42:59,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261395051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:59,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427839187] [2021-06-05 13:42:59,509 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 13:42:59,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 13:42:59,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:59,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:59,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:59,615 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 13:42:59,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427839187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:59,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:59,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 13:42:59,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756788110] [2021-06-05 13:42:59,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:59,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:59,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:59,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:59,615 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 13:42:59,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:59,729 INFO L93 Difference]: Finished difference Result 4538 states and 11042 transitions. [2021-06-05 13:42:59,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:42:59,729 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 13:42:59,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:59,732 INFO L225 Difference]: With dead ends: 4538 [2021-06-05 13:42:59,733 INFO L226 Difference]: Without dead ends: 4538 [2021-06-05 13:42:59,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:59,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4538 states. [2021-06-05 13:42:59,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4538 to 3547. [2021-06-05 13:42:59,764 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 13:42:59,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 9172 transitions. [2021-06-05 13:42:59,768 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 9172 transitions. Word has length 41 [2021-06-05 13:42:59,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:59,769 INFO L482 AbstractCegarLoop]: Abstraction has 3547 states and 9172 transitions. [2021-06-05 13:42:59,769 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 13:42:59,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 9172 transitions. [2021-06-05 13:42:59,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:42:59,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:59,771 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 13:42:59,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:59,971 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:59,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:59,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1283897782, now seen corresponding path program 35 times [2021-06-05 13:42:59,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:59,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51068043] [2021-06-05 13:42:59,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:00,032 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 13:43:00,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:00,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51068043] [2021-06-05 13:43:00,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51068043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:00,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071691898] [2021-06-05 13:43:00,033 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 13:43:00,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:43:00,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:00,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:43:00,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:00,149 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 13:43:00,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071691898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:00,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:00,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:43:00,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535313797] [2021-06-05 13:43:00,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:43:00,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:00,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:43:00,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:43:00,150 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 13:43:00,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:00,433 INFO L93 Difference]: Finished difference Result 4055 states and 10165 transitions. [2021-06-05 13:43:00,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:43:00,433 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 13:43:00,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:00,437 INFO L225 Difference]: With dead ends: 4055 [2021-06-05 13:43:00,438 INFO L226 Difference]: Without dead ends: 4047 [2021-06-05 13:43:00,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:43:00,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2021-06-05 13:43:00,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 3606. [2021-06-05 13:43:00,473 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 13:43:00,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 9309 transitions. [2021-06-05 13:43:00,477 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 9309 transitions. Word has length 41 [2021-06-05 13:43:00,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:00,477 INFO L482 AbstractCegarLoop]: Abstraction has 3606 states and 9309 transitions. [2021-06-05 13:43:00,478 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 13:43:00,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 9309 transitions. [2021-06-05 13:43:00,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:43:00,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:00,480 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 13:43:00,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 13:43:00,680 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:00,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:00,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1457372657, now seen corresponding path program 76 times [2021-06-05 13:43:00,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:00,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140722264] [2021-06-05 13:43:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:00,729 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 13:43:00,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:00,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140722264] [2021-06-05 13:43:00,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140722264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:00,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147719511] [2021-06-05 13:43:00,729 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 13:43:00,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:00,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:00,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:43:00,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:00,813 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 13:43:00,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147719511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:00,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:00,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 13:43:00,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527584172] [2021-06-05 13:43:00,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:43:00,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:00,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:43:00,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:43:00,814 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 13:43:00,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:00,918 INFO L93 Difference]: Finished difference Result 4522 states and 10995 transitions. [2021-06-05 13:43:00,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:43:00,919 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 13:43:00,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:00,922 INFO L225 Difference]: With dead ends: 4522 [2021-06-05 13:43:00,922 INFO L226 Difference]: Without dead ends: 4519 [2021-06-05 13:43:00,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:43:00,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4519 states. [2021-06-05 13:43:00,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4519 to 3605. [2021-06-05 13:43:00,953 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 13:43:00,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 9303 transitions. [2021-06-05 13:43:00,957 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 9303 transitions. Word has length 41 [2021-06-05 13:43:00,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:00,958 INFO L482 AbstractCegarLoop]: Abstraction has 3605 states and 9303 transitions. [2021-06-05 13:43:00,958 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 13:43:00,958 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 9303 transitions. [2021-06-05 13:43:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:43:00,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:00,960 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 13:43:01,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:01,160 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:01,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1664435223, now seen corresponding path program 77 times [2021-06-05 13:43:01,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:01,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943681103] [2021-06-05 13:43:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:01,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:01,219 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 13:43:01,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:01,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943681103] [2021-06-05 13:43:01,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943681103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:01,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756768592] [2021-06-05 13:43:01,220 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 13:43:01,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:43:01,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:01,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:43:01,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:01,315 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 13:43:01,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756768592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:01,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:01,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2021-06-05 13:43:01,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699872474] [2021-06-05 13:43:01,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:43:01,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:01,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:43:01,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:43:01,316 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 13:43:01,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:01,453 INFO L93 Difference]: Finished difference Result 4564 states and 11216 transitions. [2021-06-05 13:43:01,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:01,454 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 13:43:01,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:01,457 INFO L225 Difference]: With dead ends: 4564 [2021-06-05 13:43:01,457 INFO L226 Difference]: Without dead ends: 4552 [2021-06-05 13:43:01,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:43:01,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4552 states. [2021-06-05 13:43:01,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4552 to 3605. [2021-06-05 13:43:01,489 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 13:43:01,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 9300 transitions. [2021-06-05 13:43:01,493 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 9300 transitions. Word has length 41 [2021-06-05 13:43:01,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:01,493 INFO L482 AbstractCegarLoop]: Abstraction has 3605 states and 9300 transitions. [2021-06-05 13:43:01,493 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 13:43:01,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 9300 transitions. [2021-06-05 13:43:01,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:43:01,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:01,495 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 13:43:01,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:01,696 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:01,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:01,696 INFO L82 PathProgramCache]: Analyzing trace with hash 216435210, now seen corresponding path program 78 times [2021-06-05 13:43:01,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:01,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609468022] [2021-06-05 13:43:01,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:01,755 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 13:43:01,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:01,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609468022] [2021-06-05 13:43:01,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609468022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:01,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337673099] [2021-06-05 13:43:01,756 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 13:43:01,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:43:01,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:01,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:43:01,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:01,853 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 13:43:01,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337673099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:01,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:01,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:43:01,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050293316] [2021-06-05 13:43:01,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:43:01,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:01,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:43:01,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:43:01,854 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 13:43:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:02,159 INFO L93 Difference]: Finished difference Result 3907 states and 9798 transitions. [2021-06-05 13:43:02,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:43:02,159 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 13:43:02,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:02,162 INFO L225 Difference]: With dead ends: 3907 [2021-06-05 13:43:02,162 INFO L226 Difference]: Without dead ends: 3810 [2021-06-05 13:43:02,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:43:02,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-06-05 13:43:02,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 3511. [2021-06-05 13:43:02,191 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 13:43:02,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 9079 transitions. [2021-06-05 13:43:02,195 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 9079 transitions. Word has length 41 [2021-06-05 13:43:02,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:02,195 INFO L482 AbstractCegarLoop]: Abstraction has 3511 states and 9079 transitions. [2021-06-05 13:43:02,195 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 13:43:02,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 9079 transitions. [2021-06-05 13:43:02,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:43:02,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:02,197 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 13:43:02,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-06-05 13:43:02,398 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:02,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:02,398 INFO L82 PathProgramCache]: Analyzing trace with hash -397100970, now seen corresponding path program 79 times [2021-06-05 13:43:02,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:02,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067427310] [2021-06-05 13:43:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:02,462 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 13:43:02,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:02,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067427310] [2021-06-05 13:43:02,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067427310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:02,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074364817] [2021-06-05 13:43:02,462 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 13:43:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:02,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:43:02,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:02,555 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 13:43:02,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074364817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:02,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:02,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:43:02,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346077633] [2021-06-05 13:43:02,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:43:02,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:02,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:43:02,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:43:02,556 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 13:43:02,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:02,771 INFO L93 Difference]: Finished difference Result 3950 states and 9921 transitions. [2021-06-05 13:43:02,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:43:02,772 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 13:43:02,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:02,775 INFO L225 Difference]: With dead ends: 3950 [2021-06-05 13:43:02,775 INFO L226 Difference]: Without dead ends: 3938 [2021-06-05 13:43:02,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:43:02,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2021-06-05 13:43:02,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3513. [2021-06-05 13:43:02,808 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 13:43:02,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9084 transitions. [2021-06-05 13:43:02,812 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9084 transitions. Word has length 41 [2021-06-05 13:43:02,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:02,812 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9084 transitions. [2021-06-05 13:43:02,812 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 13:43:02,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9084 transitions. [2021-06-05 13:43:02,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:43:02,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:02,814 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 13:43:03,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 13:43:03,015 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:03,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:03,015 INFO L82 PathProgramCache]: Analyzing trace with hash -554400457, now seen corresponding path program 36 times [2021-06-05 13:43:03,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:03,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234462363] [2021-06-05 13:43:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:03,061 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 13:43:03,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:03,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234462363] [2021-06-05 13:43:03,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234462363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:03,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003751393] [2021-06-05 13:43:03,062 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 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 13:43:03,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:43:03,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:03,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:43:03,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:03,186 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 13:43:03,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003751393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:03,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:03,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 13 [2021-06-05 13:43:03,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642963978] [2021-06-05 13:43:03,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:43:03,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:03,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:43:03,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:43:03,186 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 13:43:03,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:03,345 INFO L93 Difference]: Finished difference Result 4278 states and 10675 transitions. [2021-06-05 13:43:03,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:43:03,345 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 13:43:03,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:03,350 INFO L225 Difference]: With dead ends: 4278 [2021-06-05 13:43:03,350 INFO L226 Difference]: Without dead ends: 4268 [2021-06-05 13:43:03,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:03,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2021-06-05 13:43:03,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 3755. [2021-06-05 13:43:03,390 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 13:43:03,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 9715 transitions. [2021-06-05 13:43:03,395 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 9715 transitions. Word has length 41 [2021-06-05 13:43:03,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:03,395 INFO L482 AbstractCegarLoop]: Abstraction has 3755 states and 9715 transitions. [2021-06-05 13:43:03,395 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 13:43:03,395 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 9715 transitions. [2021-06-05 13:43:03,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:43:03,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:03,398 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 13:43:03,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:03,599 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:03,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:03,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1744816364, now seen corresponding path program 80 times [2021-06-05 13:43:03,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:03,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590847373] [2021-06-05 13:43:03,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:03,662 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 13:43:03,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:03,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590847373] [2021-06-05 13:43:03,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590847373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:03,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177695881] [2021-06-05 13:43:03,662 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 13:43:03,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:03,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:03,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:43:03,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:03,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 13:43:03,760 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 13:43:03,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:43:03,762 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 13:43:03,762 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 13:43:03,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:43:03,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 13:43:03,770 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 13:43:03,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177695881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:03,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:03,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 13:43:03,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851928185] [2021-06-05 13:43:03,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:43:03,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:03,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:43:03,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:43:03,771 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 13:43:04,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:04,137 INFO L93 Difference]: Finished difference Result 5015 states and 12296 transitions. [2021-06-05 13:43:04,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:43:04,138 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 13:43:04,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:04,143 INFO L225 Difference]: With dead ends: 5015 [2021-06-05 13:43:04,143 INFO L226 Difference]: Without dead ends: 4961 [2021-06-05 13:43:04,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:43:04,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-06-05 13:43:04,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 3838. [2021-06-05 13:43:04,188 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 13:43:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 9931 transitions. [2021-06-05 13:43:04,194 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 9931 transitions. Word has length 41 [2021-06-05 13:43:04,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:04,194 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 9931 transitions. [2021-06-05 13:43:04,194 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 13:43:04,194 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 9931 transitions. [2021-06-05 13:43:04,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:43:04,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:04,197 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 13:43:04,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-05 13:43:04,397 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:04,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:04,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1017591823, now seen corresponding path program 81 times [2021-06-05 13:43:04,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:04,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119156085] [2021-06-05 13:43:04,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:04,452 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 13:43:04,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:04,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119156085] [2021-06-05 13:43:04,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119156085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:04,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621064233] [2021-06-05 13:43:04,452 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 13:43:04,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:43:04,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:04,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:43:04,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:04,567 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 13:43:04,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621064233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:04,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:04,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:43:04,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939364648] [2021-06-05 13:43:04,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:43:04,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:04,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:43:04,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:43:04,568 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 13:43:04,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:04,681 INFO L93 Difference]: Finished difference Result 4722 states and 11676 transitions. [2021-06-05 13:43:04,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:43:04,681 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 13:43:04,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:04,686 INFO L225 Difference]: With dead ends: 4722 [2021-06-05 13:43:04,686 INFO L226 Difference]: Without dead ends: 4704 [2021-06-05 13:43:04,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:43:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4704 states. [2021-06-05 13:43:04,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4704 to 3928. [2021-06-05 13:43:04,729 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 13:43:04,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 10211 transitions. [2021-06-05 13:43:04,734 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 10211 transitions. Word has length 41 [2021-06-05 13:43:04,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:04,735 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 10211 transitions. [2021-06-05 13:43:04,735 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 13:43:04,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 10211 transitions. [2021-06-05 13:43:04,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:43:04,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:04,737 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 13:43:04,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:04,938 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:04,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:04,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1899652898, now seen corresponding path program 82 times [2021-06-05 13:43:04,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:04,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604168113] [2021-06-05 13:43:04,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:05,025 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 13:43:05,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:05,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604168113] [2021-06-05 13:43:05,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604168113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:05,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307796267] [2021-06-05 13:43:05,025 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 13:43:05,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:05,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:05,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:43:05,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:05,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 13:43:05,161 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 13:43:05,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:43:05,164 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 13:43:05,165 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 13:43:05,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:43:05,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 13:43:05,173 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 13:43:05,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307796267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:05,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:05,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 13:43:05,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749301474] [2021-06-05 13:43:05,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:43:05,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:05,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:43:05,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:43:05,174 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 13:43:05,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:05,856 INFO L93 Difference]: Finished difference Result 7135 states and 16888 transitions. [2021-06-05 13:43:05,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 13:43:05,856 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 13:43:05,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:05,863 INFO L225 Difference]: With dead ends: 7135 [2021-06-05 13:43:05,864 INFO L226 Difference]: Without dead ends: 6955 [2021-06-05 13:43:05,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:43:05,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6955 states. [2021-06-05 13:43:05,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6955 to 4145. [2021-06-05 13:43:05,918 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 13:43:05,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 10742 transitions. [2021-06-05 13:43:05,924 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 10742 transitions. Word has length 41 [2021-06-05 13:43:05,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:05,925 INFO L482 AbstractCegarLoop]: Abstraction has 4145 states and 10742 transitions. [2021-06-05 13:43:05,925 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 13:43:05,925 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 10742 transitions. [2021-06-05 13:43:05,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:43:05,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:05,928 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 13:43:06,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 13:43:06,128 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:06,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:06,128 INFO L82 PathProgramCache]: Analyzing trace with hash -2008711721, now seen corresponding path program 83 times [2021-06-05 13:43:06,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:06,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143297360] [2021-06-05 13:43:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:06,192 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 13:43:06,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:06,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143297360] [2021-06-05 13:43:06,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143297360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:06,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263315454] [2021-06-05 13:43:06,192 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 13:43:06,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:43:06,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:06,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:43:06,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:06,303 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 13:43:06,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263315454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:06,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:06,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-06-05 13:43:06,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155705099] [2021-06-05 13:43:06,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:43:06,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:06,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:43:06,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:43:06,305 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 13:43:06,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:06,465 INFO L93 Difference]: Finished difference Result 5126 states and 12564 transitions. [2021-06-05 13:43:06,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:43:06,465 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 13:43:06,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:06,470 INFO L225 Difference]: With dead ends: 5126 [2021-06-05 13:43:06,470 INFO L226 Difference]: Without dead ends: 5099 [2021-06-05 13:43:06,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:06,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5099 states. [2021-06-05 13:43:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5099 to 4145. [2021-06-05 13:43:06,513 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 13:43:06,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 10739 transitions. [2021-06-05 13:43:06,519 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 10739 transitions. Word has length 41 [2021-06-05 13:43:06,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:06,519 INFO L482 AbstractCegarLoop]: Abstraction has 4145 states and 10739 transitions. [2021-06-05 13:43:06,519 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 13:43:06,519 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 10739 transitions. [2021-06-05 13:43:06,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:43:06,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:06,522 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 13:43:06,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 13:43:06,722 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:06,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:06,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1839961388, now seen corresponding path program 84 times [2021-06-05 13:43:06,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:06,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288084078] [2021-06-05 13:43:06,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:06,831 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 13:43:06,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:06,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288084078] [2021-06-05 13:43:06,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288084078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:06,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631425638] [2021-06-05 13:43:06,831 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 13:43:06,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 13:43:06,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:06,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:43:06,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:06,919 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 13:43:06,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631425638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:06,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:06,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:43:06,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974908694] [2021-06-05 13:43:06,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:43:06,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:06,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:43:06,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:43:06,919 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 13:43:07,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:07,896 INFO L93 Difference]: Finished difference Result 8258 states and 19418 transitions. [2021-06-05 13:43:07,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 13:43:07,896 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 13:43:07,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:07,905 INFO L225 Difference]: With dead ends: 8258 [2021-06-05 13:43:07,905 INFO L226 Difference]: Without dead ends: 7982 [2021-06-05 13:43:07,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 667.3ms TimeCoverageRelationStatistics Valid=483, Invalid=3423, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 13:43:07,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7982 states. [2021-06-05 13:43:07,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7982 to 4501. [2021-06-05 13:43:07,970 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 13:43:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 11611 transitions. [2021-06-05 13:43:07,976 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 11611 transitions. Word has length 41 [2021-06-05 13:43:07,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:07,977 INFO L482 AbstractCegarLoop]: Abstraction has 4501 states and 11611 transitions. [2021-06-05 13:43:07,977 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 13:43:07,977 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 11611 transitions. [2021-06-05 13:43:07,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:43:07,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:07,980 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 13:43:08,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 13:43:08,181 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:08,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:08,181 INFO L82 PathProgramCache]: Analyzing trace with hash -561433039, now seen corresponding path program 85 times [2021-06-05 13:43:08,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:08,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937136354] [2021-06-05 13:43:08,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:08,256 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 13:43:08,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:08,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937136354] [2021-06-05 13:43:08,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937136354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:08,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896270244] [2021-06-05 13:43:08,257 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 13:43:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:08,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:43:08,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:08,361 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 13:43:08,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896270244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:08,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:08,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:43:08,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140721495] [2021-06-05 13:43:08,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:43:08,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:08,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:43:08,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:43:08,362 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 13:43:08,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:08,525 INFO L93 Difference]: Finished difference Result 5578 states and 13597 transitions. [2021-06-05 13:43:08,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:08,525 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 13:43:08,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:08,530 INFO L225 Difference]: With dead ends: 5578 [2021-06-05 13:43:08,530 INFO L226 Difference]: Without dead ends: 5542 [2021-06-05 13:43:08,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:08,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5542 states. [2021-06-05 13:43:08,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5542 to 4501. [2021-06-05 13:43:08,573 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 13:43:08,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 11608 transitions. [2021-06-05 13:43:08,578 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 11608 transitions. Word has length 41 [2021-06-05 13:43:08,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:08,579 INFO L482 AbstractCegarLoop]: Abstraction has 4501 states and 11608 transitions. [2021-06-05 13:43:08,579 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 13:43:08,579 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 11608 transitions. [2021-06-05 13:43:08,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:43:08,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:08,581 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 13:43:08,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:08,782 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:08,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:08,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1686647522, now seen corresponding path program 86 times [2021-06-05 13:43:08,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:08,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157033645] [2021-06-05 13:43:08,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:08,871 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 13:43:08,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:08,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157033645] [2021-06-05 13:43:08,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157033645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:08,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954220735] [2021-06-05 13:43:08,871 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 13:43:08,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:08,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:08,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:43:08,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:08,957 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 13:43:08,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954220735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:08,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:08,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:43:08,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324619221] [2021-06-05 13:43:08,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:43:08,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:08,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:43:08,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:43:08,958 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 13:43:09,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:09,348 INFO L93 Difference]: Finished difference Result 5731 states and 13840 transitions. [2021-06-05 13:43:09,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:43:09,348 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 13:43:09,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:09,353 INFO L225 Difference]: With dead ends: 5731 [2021-06-05 13:43:09,353 INFO L226 Difference]: Without dead ends: 5353 [2021-06-05 13:43:09,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 222.4ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:43:09,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2021-06-05 13:43:09,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 3673. [2021-06-05 13:43:09,392 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 13:43:09,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 9611 transitions. [2021-06-05 13:43:09,397 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 9611 transitions. Word has length 41 [2021-06-05 13:43:09,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:09,397 INFO L482 AbstractCegarLoop]: Abstraction has 3673 states and 9611 transitions. [2021-06-05 13:43:09,397 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 13:43:09,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 9611 transitions. [2021-06-05 13:43:09,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:43:09,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:09,399 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 13:43:09,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 13:43:09,599 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:09,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:09,600 INFO L82 PathProgramCache]: Analyzing trace with hash 826705595, now seen corresponding path program 37 times [2021-06-05 13:43:09,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:09,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356237376] [2021-06-05 13:43:09,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:09,647 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 13:43:09,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:09,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356237376] [2021-06-05 13:43:09,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356237376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:09,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347914696] [2021-06-05 13:43:09,647 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 13:43:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:09,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:43:09,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:09,743 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 13:43:09,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347914696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:09,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:09,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-05 13:43:09,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515478404] [2021-06-05 13:43:09,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:43:09,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:09,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:43:09,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:43:09,744 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 13:43:10,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:10,063 INFO L93 Difference]: Finished difference Result 4473 states and 11190 transitions. [2021-06-05 13:43:10,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:43:10,063 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 13:43:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:10,067 INFO L225 Difference]: With dead ends: 4473 [2021-06-05 13:43:10,067 INFO L226 Difference]: Without dead ends: 4473 [2021-06-05 13:43:10,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 149.4ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:43:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4473 states. [2021-06-05 13:43:10,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4473 to 3628. [2021-06-05 13:43:10,102 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 13:43:10,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 9526 transitions. [2021-06-05 13:43:10,129 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 9526 transitions. Word has length 41 [2021-06-05 13:43:10,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:10,129 INFO L482 AbstractCegarLoop]: Abstraction has 3628 states and 9526 transitions. [2021-06-05 13:43:10,129 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 13:43:10,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 9526 transitions. [2021-06-05 13:43:10,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:43:10,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:10,131 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 13:43:10,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:10,331 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:10,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:10,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1858902121, now seen corresponding path program 87 times [2021-06-05 13:43:10,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:10,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656435808] [2021-06-05 13:43:10,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:10,419 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 13:43:10,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:10,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656435808] [2021-06-05 13:43:10,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656435808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:10,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537262601] [2021-06-05 13:43:10,419 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 13:43:10,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:43:10,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:10,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:43:10,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:10,507 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 13:43:10,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537262601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:10,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:10,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:43:10,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641277122] [2021-06-05 13:43:10,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:43:10,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:10,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:43:10,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:43:10,508 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 13:43:10,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:10,692 INFO L93 Difference]: Finished difference Result 4326 states and 10808 transitions. [2021-06-05 13:43:10,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:43:10,693 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 13:43:10,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:10,697 INFO L225 Difference]: With dead ends: 4326 [2021-06-05 13:43:10,697 INFO L226 Difference]: Without dead ends: 4279 [2021-06-05 13:43:10,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:43:10,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4279 states. [2021-06-05 13:43:10,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4279 to 3637. [2021-06-05 13:43:10,732 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 13:43:10,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3637 states to 3637 states and 9540 transitions. [2021-06-05 13:43:10,737 INFO L78 Accepts]: Start accepts. Automaton has 3637 states and 9540 transitions. Word has length 41 [2021-06-05 13:43:10,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:10,737 INFO L482 AbstractCegarLoop]: Abstraction has 3637 states and 9540 transitions. [2021-06-05 13:43:10,737 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 13:43:10,737 INFO L276 IsEmpty]: Start isEmpty. Operand 3637 states and 9540 transitions. [2021-06-05 13:43:10,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:43:10,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:10,740 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 13:43:10,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-05 13:43:10,940 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:10,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:10,940 INFO L82 PathProgramCache]: Analyzing trace with hash 714915480, now seen corresponding path program 88 times [2021-06-05 13:43:10,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:10,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441051892] [2021-06-05 13:43:10,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:10,994 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 13:43:10,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:10,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441051892] [2021-06-05 13:43:10,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441051892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:10,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598607681] [2021-06-05 13:43:10,994 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 13:43:11,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:11,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:11,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:43:11,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:11,244 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 13:43:11,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598607681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:11,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:11,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-06-05 13:43:11,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028661932] [2021-06-05 13:43:11,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:43:11,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:11,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:43:11,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:43:11,245 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 13:43:12,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:12,203 INFO L93 Difference]: Finished difference Result 5488 states and 13282 transitions. [2021-06-05 13:43:12,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 13:43:12,203 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 13:43:12,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:12,208 INFO L225 Difference]: With dead ends: 5488 [2021-06-05 13:43:12,208 INFO L226 Difference]: Without dead ends: 5450 [2021-06-05 13:43:12,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 547.1ms TimeCoverageRelationStatistics Valid=473, Invalid=1783, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 13:43:12,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5450 states. [2021-06-05 13:43:12,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5450 to 4188. [2021-06-05 13:43:12,247 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 13:43:12,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 10765 transitions. [2021-06-05 13:43:12,252 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 10765 transitions. Word has length 44 [2021-06-05 13:43:12,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:12,252 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 10765 transitions. [2021-06-05 13:43:12,252 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 13:43:12,252 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 10765 transitions. [2021-06-05 13:43:12,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:43:12,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:12,255 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 13:43:12,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 13:43:12,455 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:12,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:12,456 INFO L82 PathProgramCache]: Analyzing trace with hash 667584024, now seen corresponding path program 89 times [2021-06-05 13:43:12,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:12,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372590] [2021-06-05 13:43:12,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:12,502 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 13:43:12,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:12,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372590] [2021-06-05 13:43:12,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:12,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907599303] [2021-06-05 13:43:12,502 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 13:43:12,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 13:43:12,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:12,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:43:12,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:12,586 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 13:43:12,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907599303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:12,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:12,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 13:43:12,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218601569] [2021-06-05 13:43:12,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:43:12,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:12,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:43:12,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:43:12,587 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 13:43:12,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:12,780 INFO L93 Difference]: Finished difference Result 4818 states and 11987 transitions. [2021-06-05 13:43:12,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:43:12,781 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 13:43:12,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:12,786 INFO L225 Difference]: With dead ends: 4818 [2021-06-05 13:43:12,786 INFO L226 Difference]: Without dead ends: 4783 [2021-06-05 13:43:12,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:43:12,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2021-06-05 13:43:12,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 4206. [2021-06-05 13:43:12,827 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 13:43:12,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4206 states to 4206 states and 10803 transitions. [2021-06-05 13:43:12,833 INFO L78 Accepts]: Start accepts. Automaton has 4206 states and 10803 transitions. Word has length 44 [2021-06-05 13:43:12,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:12,833 INFO L482 AbstractCegarLoop]: Abstraction has 4206 states and 10803 transitions. [2021-06-05 13:43:12,833 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 13:43:12,833 INFO L276 IsEmpty]: Start isEmpty. Operand 4206 states and 10803 transitions. [2021-06-05 13:43:12,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:43:12,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:12,836 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 13:43:13,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:13,037 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:13,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:13,037 INFO L82 PathProgramCache]: Analyzing trace with hash -19269454, now seen corresponding path program 90 times [2021-06-05 13:43:13,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:13,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903077134] [2021-06-05 13:43:13,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:13,084 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 13:43:13,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:13,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903077134] [2021-06-05 13:43:13,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903077134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:13,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129883157] [2021-06-05 13:43:13,084 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 13:43:13,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 13:43:13,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:13,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:43:13,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:13,246 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 13:43:13,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129883157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:13,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:13,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:43:13,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922815180] [2021-06-05 13:43:13,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:43:13,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:13,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:43:13,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:13,247 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 13:43:13,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:13,867 INFO L93 Difference]: Finished difference Result 6446 states and 15040 transitions. [2021-06-05 13:43:13,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:43:13,868 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 13:43:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:13,872 INFO L225 Difference]: With dead ends: 6446 [2021-06-05 13:43:13,872 INFO L226 Difference]: Without dead ends: 6383 [2021-06-05 13:43:13,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 282.7ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:43:13,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6383 states. [2021-06-05 13:43:13,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6383 to 4276. [2021-06-05 13:43:13,909 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 13:43:13,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4276 states to 4276 states and 10946 transitions. [2021-06-05 13:43:13,914 INFO L78 Accepts]: Start accepts. Automaton has 4276 states and 10946 transitions. Word has length 44 [2021-06-05 13:43:13,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:13,914 INFO L482 AbstractCegarLoop]: Abstraction has 4276 states and 10946 transitions. [2021-06-05 13:43:13,915 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 13:43:13,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4276 states and 10946 transitions. [2021-06-05 13:43:13,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:43:13,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:13,917 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 13:43:14,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-05 13:43:14,118 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:14,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:14,118 INFO L82 PathProgramCache]: Analyzing trace with hash -847034408, now seen corresponding path program 91 times [2021-06-05 13:43:14,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:14,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133486212] [2021-06-05 13:43:14,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:14,164 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 13:43:14,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:14,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133486212] [2021-06-05 13:43:14,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133486212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:14,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450294825] [2021-06-05 13:43:14,165 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 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 13:43:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:14,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:43:14,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:14,252 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 13:43:14,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450294825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:14,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:14,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 13:43:14,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096596699] [2021-06-05 13:43:14,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:43:14,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:14,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:43:14,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:43:14,253 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 13:43:14,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:14,440 INFO L93 Difference]: Finished difference Result 4915 states and 12209 transitions. [2021-06-05 13:43:14,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:43:14,441 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 13:43:14,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:14,445 INFO L225 Difference]: With dead ends: 4915 [2021-06-05 13:43:14,445 INFO L226 Difference]: Without dead ends: 4877 [2021-06-05 13:43:14,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:43:14,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4877 states. [2021-06-05 13:43:14,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4877 to 4348. [2021-06-05 13:43:14,479 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 13:43:14,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4348 states to 4348 states and 11085 transitions. [2021-06-05 13:43:14,484 INFO L78 Accepts]: Start accepts. Automaton has 4348 states and 11085 transitions. Word has length 44 [2021-06-05 13:43:14,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:14,484 INFO L482 AbstractCegarLoop]: Abstraction has 4348 states and 11085 transitions. [2021-06-05 13:43:14,484 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 13:43:14,484 INFO L276 IsEmpty]: Start isEmpty. Operand 4348 states and 11085 transitions. [2021-06-05 13:43:14,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:43:14,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:14,487 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 13:43:14,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:14,688 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:14,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:14,688 INFO L82 PathProgramCache]: Analyzing trace with hash 909434610, now seen corresponding path program 92 times [2021-06-05 13:43:14,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:14,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299651332] [2021-06-05 13:43:14,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:14,733 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 13:43:14,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:14,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299651332] [2021-06-05 13:43:14,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299651332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:14,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829454174] [2021-06-05 13:43:14,733 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 13:43:14,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:14,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:14,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:43:14,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:14,890 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 13:43:14,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829454174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:14,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:14,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:43:14,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903864264] [2021-06-05 13:43:14,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:43:14,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:14,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:43:14,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:14,892 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 13:43:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:15,568 INFO L93 Difference]: Finished difference Result 6734 states and 15579 transitions. [2021-06-05 13:43:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:43:15,569 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 13:43:15,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:15,576 INFO L225 Difference]: With dead ends: 6734 [2021-06-05 13:43:15,576 INFO L226 Difference]: Without dead ends: 6671 [2021-06-05 13:43:15,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 301.6ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:43:15,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6671 states. [2021-06-05 13:43:15,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6671 to 4452. [2021-06-05 13:43:15,625 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 13:43:15,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4452 states to 4452 states and 11289 transitions. [2021-06-05 13:43:15,631 INFO L78 Accepts]: Start accepts. Automaton has 4452 states and 11289 transitions. Word has length 44 [2021-06-05 13:43:15,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:15,631 INFO L482 AbstractCegarLoop]: Abstraction has 4452 states and 11289 transitions. [2021-06-05 13:43:15,631 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 13:43:15,631 INFO L276 IsEmpty]: Start isEmpty. Operand 4452 states and 11289 transitions. [2021-06-05 13:43:15,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:43:15,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:15,634 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 13:43:15,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:15,834 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:15,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:15,835 INFO L82 PathProgramCache]: Analyzing trace with hash -2003584616, now seen corresponding path program 93 times [2021-06-05 13:43:15,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:15,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269307530] [2021-06-05 13:43:15,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:15,880 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 13:43:15,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:15,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269307530] [2021-06-05 13:43:15,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269307530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:15,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683452246] [2021-06-05 13:43:15,881 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 13:43:15,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 13:43:15,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:15,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:43:15,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:16,047 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 13:43:16,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683452246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:16,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:16,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:43:16,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760552593] [2021-06-05 13:43:16,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:43:16,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:16,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:43:16,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:16,048 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 13:43:16,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:16,734 INFO L93 Difference]: Finished difference Result 7036 states and 16396 transitions. [2021-06-05 13:43:16,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:43:16,734 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 13:43:16,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:16,741 INFO L225 Difference]: With dead ends: 7036 [2021-06-05 13:43:16,741 INFO L226 Difference]: Without dead ends: 6998 [2021-06-05 13:43:16,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 300.7ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:43:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6998 states. [2021-06-05 13:43:16,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6998 to 4889. [2021-06-05 13:43:16,794 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 13:43:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4889 states to 4889 states and 12408 transitions. [2021-06-05 13:43:16,800 INFO L78 Accepts]: Start accepts. Automaton has 4889 states and 12408 transitions. Word has length 44 [2021-06-05 13:43:16,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:16,800 INFO L482 AbstractCegarLoop]: Abstraction has 4889 states and 12408 transitions. [2021-06-05 13:43:16,801 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 13:43:16,801 INFO L276 IsEmpty]: Start isEmpty. Operand 4889 states and 12408 transitions. [2021-06-05 13:43:16,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:16,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:16,804 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 13:43:17,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:17,005 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:17,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:17,005 INFO L82 PathProgramCache]: Analyzing trace with hash 106678869, now seen corresponding path program 38 times [2021-06-05 13:43:17,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:17,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962001594] [2021-06-05 13:43:17,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:17,119 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 13:43:17,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:17,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962001594] [2021-06-05 13:43:17,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962001594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:17,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752399657] [2021-06-05 13:43:17,119 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 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 13:43:17,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:17,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:17,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:43:17,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:17,837 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 13:43:17,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752399657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:17,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:17,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-06-05 13:43:17,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502531206] [2021-06-05 13:43:17,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 13:43:17,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:17,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 13:43:17,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:43:17,839 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 13:43:25,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:25,776 INFO L93 Difference]: Finished difference Result 12578 states and 28875 transitions. [2021-06-05 13:43:25,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2021-06-05 13:43:25,776 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 13:43:25,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:25,789 INFO L225 Difference]: With dead ends: 12578 [2021-06-05 13:43:25,789 INFO L226 Difference]: Without dead ends: 12155 [2021-06-05 13:43:25,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17409 ImplicationChecksByTransitivity, 6649.5ms TimeCoverageRelationStatistics Valid=5955, Invalid=38777, Unknown=0, NotChecked=0, Total=44732 [2021-06-05 13:43:25,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12155 states. [2021-06-05 13:43:25,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12155 to 6139. [2021-06-05 13:43:25,906 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 13:43:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6139 states to 6139 states and 16102 transitions. [2021-06-05 13:43:25,915 INFO L78 Accepts]: Start accepts. Automaton has 6139 states and 16102 transitions. Word has length 47 [2021-06-05 13:43:25,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:25,915 INFO L482 AbstractCegarLoop]: Abstraction has 6139 states and 16102 transitions. [2021-06-05 13:43:25,915 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 13:43:25,915 INFO L276 IsEmpty]: Start isEmpty. Operand 6139 states and 16102 transitions. [2021-06-05 13:43:25,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:25,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:25,920 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 13:43:26,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:26,121 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:26,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:26,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1531001323, now seen corresponding path program 94 times [2021-06-05 13:43:26,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:26,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355390114] [2021-06-05 13:43:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:26,245 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 13:43:26,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:26,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355390114] [2021-06-05 13:43:26,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355390114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:26,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218708976] [2021-06-05 13:43:26,246 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 13:43:26,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:26,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:26,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:43:26,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:26,530 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 13:43:26,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218708976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:26,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:26,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:43:26,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853776555] [2021-06-05 13:43:26,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:43:26,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:26,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:43:26,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:43:26,531 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 13:43:27,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:27,208 INFO L93 Difference]: Finished difference Result 6357 states and 16438 transitions. [2021-06-05 13:43:27,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:43:27,208 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 13:43:27,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:27,216 INFO L225 Difference]: With dead ends: 6357 [2021-06-05 13:43:27,216 INFO L226 Difference]: Without dead ends: 6277 [2021-06-05 13:43:27,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 218.5ms TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:43:27,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6277 states. [2021-06-05 13:43:27,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6277 to 6123. [2021-06-05 13:43:27,279 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 13:43:27,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6123 states to 6123 states and 16046 transitions. [2021-06-05 13:43:27,288 INFO L78 Accepts]: Start accepts. Automaton has 6123 states and 16046 transitions. Word has length 47 [2021-06-05 13:43:27,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:27,289 INFO L482 AbstractCegarLoop]: Abstraction has 6123 states and 16046 transitions. [2021-06-05 13:43:27,289 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 13:43:27,289 INFO L276 IsEmpty]: Start isEmpty. Operand 6123 states and 16046 transitions. [2021-06-05 13:43:27,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:27,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:27,294 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 13:43:27,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:27,494 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:27,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:27,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1758131688, now seen corresponding path program 39 times [2021-06-05 13:43:27,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:27,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600881442] [2021-06-05 13:43:27,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:27,559 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 13:43:27,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:27,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600881442] [2021-06-05 13:43:27,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600881442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:27,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264570817] [2021-06-05 13:43:27,560 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 13:43:27,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:43:27,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:27,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:27,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:27,669 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 13:43:27,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264570817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:27,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:27,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 13:43:27,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109182910] [2021-06-05 13:43:27,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:43:27,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:27,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:43:27,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:43:27,670 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 13:43:27,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:27,846 INFO L93 Difference]: Finished difference Result 8127 states and 20029 transitions. [2021-06-05 13:43:27,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:27,846 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 47 [2021-06-05 13:43:27,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:27,856 INFO L225 Difference]: With dead ends: 8127 [2021-06-05 13:43:27,856 INFO L226 Difference]: Without dead ends: 8117 [2021-06-05 13:43:27,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:43:27,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-06-05 13:43:27,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6179. [2021-06-05 13:43:27,935 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 13:43:27,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6179 states to 6179 states and 16226 transitions. [2021-06-05 13:43:27,944 INFO L78 Accepts]: Start accepts. Automaton has 6179 states and 16226 transitions. Word has length 47 [2021-06-05 13:43:27,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:27,944 INFO L482 AbstractCegarLoop]: Abstraction has 6179 states and 16226 transitions. [2021-06-05 13:43:27,944 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 13:43:27,945 INFO L276 IsEmpty]: Start isEmpty. Operand 6179 states and 16226 transitions. [2021-06-05 13:43:27,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:27,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:27,950 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 13:43:28,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:28,157 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:28,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:28,157 INFO L82 PathProgramCache]: Analyzing trace with hash 800939048, now seen corresponding path program 40 times [2021-06-05 13:43:28,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:28,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591818815] [2021-06-05 13:43:28,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:28,218 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 13:43:28,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:28,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591818815] [2021-06-05 13:43:28,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591818815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:28,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049620031] [2021-06-05 13:43:28,218 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 13:43:28,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:28,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:28,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:28,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:28,330 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 13:43:28,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049620031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:28,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:28,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 13:43:28,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383698170] [2021-06-05 13:43:28,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:43:28,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:28,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:43:28,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:43:28,332 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 13:43:28,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:28,533 INFO L93 Difference]: Finished difference Result 9199 states and 22998 transitions. [2021-06-05 13:43:28,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:28,534 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 13:43:28,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:28,544 INFO L225 Difference]: With dead ends: 9199 [2021-06-05 13:43:28,545 INFO L226 Difference]: Without dead ends: 9199 [2021-06-05 13:43:28,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:43:28,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9199 states. [2021-06-05 13:43:28,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9199 to 6799. [2021-06-05 13:43:28,636 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 13:43:28,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6799 states to 6799 states and 18180 transitions. [2021-06-05 13:43:28,647 INFO L78 Accepts]: Start accepts. Automaton has 6799 states and 18180 transitions. Word has length 47 [2021-06-05 13:43:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:28,647 INFO L482 AbstractCegarLoop]: Abstraction has 6799 states and 18180 transitions. [2021-06-05 13:43:28,647 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 13:43:28,647 INFO L276 IsEmpty]: Start isEmpty. Operand 6799 states and 18180 transitions. [2021-06-05 13:43:28,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:28,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:28,653 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 13:43:28,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-05 13:43:28,853 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:28,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:28,853 INFO L82 PathProgramCache]: Analyzing trace with hash 267073672, now seen corresponding path program 95 times [2021-06-05 13:43:28,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:28,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425469964] [2021-06-05 13:43:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:28,914 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 13:43:28,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:28,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425469964] [2021-06-05 13:43:28,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425469964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:28,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870123902] [2021-06-05 13:43:28,914 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 13:43:28,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:43:28,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:28,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:28,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:29,043 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 13:43:29,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870123902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:29,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:29,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2021-06-05 13:43:29,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782538718] [2021-06-05 13:43:29,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:29,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:29,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:29,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:29,044 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 13:43:29,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:29,274 INFO L93 Difference]: Finished difference Result 7639 states and 19695 transitions. [2021-06-05 13:43:29,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:43:29,274 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 13:43:29,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:29,283 INFO L225 Difference]: With dead ends: 7639 [2021-06-05 13:43:29,283 INFO L226 Difference]: Without dead ends: 7633 [2021-06-05 13:43:29,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:29,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7633 states. [2021-06-05 13:43:29,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7633 to 6743. [2021-06-05 13:43:29,380 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 13:43:29,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6743 states to 6743 states and 18003 transitions. [2021-06-05 13:43:29,390 INFO L78 Accepts]: Start accepts. Automaton has 6743 states and 18003 transitions. Word has length 47 [2021-06-05 13:43:29,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:29,390 INFO L482 AbstractCegarLoop]: Abstraction has 6743 states and 18003 transitions. [2021-06-05 13:43:29,390 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 13:43:29,390 INFO L276 IsEmpty]: Start isEmpty. Operand 6743 states and 18003 transitions. [2021-06-05 13:43:29,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:29,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:29,395 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 13:43:29,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 13:43:29,596 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:29,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:29,596 INFO L82 PathProgramCache]: Analyzing trace with hash -38499627, now seen corresponding path program 41 times [2021-06-05 13:43:29,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:29,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440340647] [2021-06-05 13:43:29,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:29,670 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 13:43:29,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:29,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440340647] [2021-06-05 13:43:29,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440340647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:29,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765395567] [2021-06-05 13:43:29,670 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 13:43:29,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 13:43:29,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:29,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:43:29,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:29,770 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 13:43:29,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765395567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:29,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:29,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:43:29,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589693444] [2021-06-05 13:43:29,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:43:29,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:29,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:43:29,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:43:29,770 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 13:43:30,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:30,082 INFO L93 Difference]: Finished difference Result 7999 states and 20457 transitions. [2021-06-05 13:43:30,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:43:30,082 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 13:43:30,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:30,090 INFO L225 Difference]: With dead ends: 7999 [2021-06-05 13:43:30,091 INFO L226 Difference]: Without dead ends: 7961 [2021-06-05 13:43:30,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:30,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7961 states. [2021-06-05 13:43:30,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7961 to 6838. [2021-06-05 13:43:30,177 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 13:43:30,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6838 states to 6838 states and 18239 transitions. [2021-06-05 13:43:30,189 INFO L78 Accepts]: Start accepts. Automaton has 6838 states and 18239 transitions. Word has length 47 [2021-06-05 13:43:30,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:30,189 INFO L482 AbstractCegarLoop]: Abstraction has 6838 states and 18239 transitions. [2021-06-05 13:43:30,189 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 13:43:30,189 INFO L276 IsEmpty]: Start isEmpty. Operand 6838 states and 18239 transitions. [2021-06-05 13:43:30,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:30,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:30,194 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 13:43:30,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:30,394 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:30,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:30,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1592196484, now seen corresponding path program 96 times [2021-06-05 13:43:30,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:30,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378671311] [2021-06-05 13:43:30,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:30,444 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 13:43:30,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:30,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378671311] [2021-06-05 13:43:30,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378671311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:30,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519998043] [2021-06-05 13:43:30,444 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 13:43:30,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:43:30,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:30,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:30,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:30,542 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 13:43:30,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519998043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:30,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:30,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 13:43:30,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575559070] [2021-06-05 13:43:30,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:43:30,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:30,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:43:30,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:43:30,543 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 13:43:30,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:30,670 INFO L93 Difference]: Finished difference Result 7980 states and 20237 transitions. [2021-06-05 13:43:30,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:43:30,671 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 13:43:30,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:30,679 INFO L225 Difference]: With dead ends: 7980 [2021-06-05 13:43:30,679 INFO L226 Difference]: Without dead ends: 7977 [2021-06-05 13:43:30,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:43:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7977 states. [2021-06-05 13:43:30,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7977 to 6818. [2021-06-05 13:43:30,761 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 13:43:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6818 states to 6818 states and 18165 transitions. [2021-06-05 13:43:30,771 INFO L78 Accepts]: Start accepts. Automaton has 6818 states and 18165 transitions. Word has length 47 [2021-06-05 13:43:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:30,772 INFO L482 AbstractCegarLoop]: Abstraction has 6818 states and 18165 transitions. [2021-06-05 13:43:30,772 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 13:43:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 6818 states and 18165 transitions. [2021-06-05 13:43:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:30,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:30,776 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 13:43:30,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-06-05 13:43:30,977 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:30,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:30,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1385133918, now seen corresponding path program 97 times [2021-06-05 13:43:30,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:30,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031886615] [2021-06-05 13:43:30,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:31,032 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 13:43:31,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:31,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031886615] [2021-06-05 13:43:31,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031886615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:31,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246544130] [2021-06-05 13:43:31,032 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 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 13:43:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:31,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:31,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:31,142 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 13:43:31,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246544130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:31,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:31,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:43:31,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362649770] [2021-06-05 13:43:31,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:43:31,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:31,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:43:31,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:43:31,143 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 13:43:31,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:31,327 INFO L93 Difference]: Finished difference Result 7990 states and 20202 transitions. [2021-06-05 13:43:31,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:31,327 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 13:43:31,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:31,339 INFO L225 Difference]: With dead ends: 7990 [2021-06-05 13:43:31,339 INFO L226 Difference]: Without dead ends: 7972 [2021-06-05 13:43:31,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:43:31,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7972 states. [2021-06-05 13:43:31,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7972 to 6576. [2021-06-05 13:43:31,444 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 13:43:31,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6576 states to 6576 states and 17436 transitions. [2021-06-05 13:43:31,458 INFO L78 Accepts]: Start accepts. Automaton has 6576 states and 17436 transitions. Word has length 47 [2021-06-05 13:43:31,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:31,458 INFO L482 AbstractCegarLoop]: Abstraction has 6576 states and 17436 transitions. [2021-06-05 13:43:31,458 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 13:43:31,458 INFO L276 IsEmpty]: Start isEmpty. Operand 6576 states and 17436 transitions. [2021-06-05 13:43:31,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:31,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:31,465 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 13:43:31,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:31,685 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:31,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:31,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1461833365, now seen corresponding path program 98 times [2021-06-05 13:43:31,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:31,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127889304] [2021-06-05 13:43:31,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:31,757 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 13:43:31,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:31,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127889304] [2021-06-05 13:43:31,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127889304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:31,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173836656] [2021-06-05 13:43:31,758 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 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 13:43:31,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:31,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:31,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:43:31,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:31,870 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 13:43:31,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173836656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:31,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:31,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:43:31,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325861319] [2021-06-05 13:43:31,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:43:31,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:31,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:43:31,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:43:31,871 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 13:43:32,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:32,303 INFO L93 Difference]: Finished difference Result 7270 states and 18664 transitions. [2021-06-05 13:43:32,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:43:32,303 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 13:43:32,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:32,311 INFO L225 Difference]: With dead ends: 7270 [2021-06-05 13:43:32,311 INFO L226 Difference]: Without dead ends: 7232 [2021-06-05 13:43:32,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:32,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7232 states. [2021-06-05 13:43:32,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7232 to 6547. [2021-06-05 13:43:32,402 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 13:43:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6547 states to 6547 states and 17357 transitions. [2021-06-05 13:43:32,413 INFO L78 Accepts]: Start accepts. Automaton has 6547 states and 17357 transitions. Word has length 47 [2021-06-05 13:43:32,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:32,413 INFO L482 AbstractCegarLoop]: Abstraction has 6547 states and 17357 transitions. [2021-06-05 13:43:32,413 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 13:43:32,413 INFO L276 IsEmpty]: Start isEmpty. Operand 6547 states and 17357 transitions. [2021-06-05 13:43:32,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:32,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:32,418 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 13:43:32,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 13:43:32,618 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:32,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:32,619 INFO L82 PathProgramCache]: Analyzing trace with hash 848297185, now seen corresponding path program 99 times [2021-06-05 13:43:32,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:32,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109546480] [2021-06-05 13:43:32,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:32,691 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 13:43:32,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:32,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109546480] [2021-06-05 13:43:32,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109546480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:32,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782857990] [2021-06-05 13:43:32,691 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 13:43:32,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 13:43:32,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:32,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:43:32,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:32,794 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 13:43:32,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782857990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:32,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:32,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:43:32,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827066363] [2021-06-05 13:43:32,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:43:32,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:32,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:43:32,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:43:32,795 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 13:43:33,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:33,118 INFO L93 Difference]: Finished difference Result 7510 states and 19214 transitions. [2021-06-05 13:43:33,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:43:33,118 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 13:43:33,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:33,126 INFO L225 Difference]: With dead ends: 7510 [2021-06-05 13:43:33,126 INFO L226 Difference]: Without dead ends: 7498 [2021-06-05 13:43:33,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:33,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7498 states. [2021-06-05 13:43:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7498 to 6557. [2021-06-05 13:43:33,190 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 13:43:33,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6557 states to 6557 states and 17377 transitions. [2021-06-05 13:43:33,198 INFO L78 Accepts]: Start accepts. Automaton has 6557 states and 17377 transitions. Word has length 47 [2021-06-05 13:43:33,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:33,198 INFO L482 AbstractCegarLoop]: Abstraction has 6557 states and 17377 transitions. [2021-06-05 13:43:33,199 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 13:43:33,199 INFO L276 IsEmpty]: Start isEmpty. Operand 6557 states and 17377 transitions. [2021-06-05 13:43:33,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:33,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:33,203 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 13:43:33,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 13:43:33,403 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:33,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:33,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1304752777, now seen corresponding path program 100 times [2021-06-05 13:43:33,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:33,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948176522] [2021-06-05 13:43:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:33,487 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 13:43:33,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:33,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948176522] [2021-06-05 13:43:33,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948176522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:33,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710198165] [2021-06-05 13:43:33,487 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 13:43:33,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:33,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:33,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:43:33,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:33,607 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 13:43:33,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710198165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:33,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:33,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:43:33,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745090223] [2021-06-05 13:43:33,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:43:33,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:33,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:43:33,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:43:33,608 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 13:43:34,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:34,062 INFO L93 Difference]: Finished difference Result 8002 states and 20257 transitions. [2021-06-05 13:43:34,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:43:34,063 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 13:43:34,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:34,071 INFO L225 Difference]: With dead ends: 8002 [2021-06-05 13:43:34,071 INFO L226 Difference]: Without dead ends: 7990 [2021-06-05 13:43:34,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:43:34,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-06-05 13:43:34,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 6589. [2021-06-05 13:43:34,139 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 13:43:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6589 states to 6589 states and 17455 transitions. [2021-06-05 13:43:34,148 INFO L78 Accepts]: Start accepts. Automaton has 6589 states and 17455 transitions. Word has length 47 [2021-06-05 13:43:34,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:34,148 INFO L482 AbstractCegarLoop]: Abstraction has 6589 states and 17455 transitions. [2021-06-05 13:43:34,148 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 13:43:34,148 INFO L276 IsEmpty]: Start isEmpty. Operand 6589 states and 17455 transitions. [2021-06-05 13:43:34,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:34,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:34,153 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 13:43:34,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 13:43:34,353 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:34,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:34,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1542814294, now seen corresponding path program 42 times [2021-06-05 13:43:34,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:34,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313270538] [2021-06-05 13:43:34,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:34,406 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 13:43:34,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:34,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313270538] [2021-06-05 13:43:34,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313270538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:34,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758152025] [2021-06-05 13:43:34,407 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 13:43:34,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 13:43:34,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:34,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:34,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:34,555 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 13:43:34,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758152025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:34,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:34,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 16 [2021-06-05 13:43:34,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610814706] [2021-06-05 13:43:34,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:34,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:34,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:34,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:34,556 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 13:43:34,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:34,815 INFO L93 Difference]: Finished difference Result 9290 states and 23114 transitions. [2021-06-05 13:43:34,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:43:34,815 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 13:43:34,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:34,824 INFO L225 Difference]: With dead ends: 9290 [2021-06-05 13:43:34,824 INFO L226 Difference]: Without dead ends: 9268 [2021-06-05 13:43:34,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:43:34,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9268 states. [2021-06-05 13:43:34,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9268 to 6764. [2021-06-05 13:43:34,899 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 13:43:34,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6764 states to 6764 states and 17975 transitions. [2021-06-05 13:43:34,908 INFO L78 Accepts]: Start accepts. Automaton has 6764 states and 17975 transitions. Word has length 47 [2021-06-05 13:43:34,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:34,908 INFO L482 AbstractCegarLoop]: Abstraction has 6764 states and 17975 transitions. [2021-06-05 13:43:34,909 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 13:43:34,909 INFO L276 IsEmpty]: Start isEmpty. Operand 6764 states and 17975 transitions. [2021-06-05 13:43:34,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:34,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:34,913 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 13:43:35,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 13:43:35,113 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:35,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:35,114 INFO L82 PathProgramCache]: Analyzing trace with hash 2130272592, now seen corresponding path program 43 times [2021-06-05 13:43:35,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:35,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073651146] [2021-06-05 13:43:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:35,167 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 13:43:35,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:35,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073651146] [2021-06-05 13:43:35,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073651146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:35,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636727387] [2021-06-05 13:43:35,167 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 13:43:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:35,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:35,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:35,268 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 13:43:35,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636727387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:35,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:35,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 13:43:35,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365602574] [2021-06-05 13:43:35,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:43:35,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:35,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:43:35,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:43:35,269 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 13:43:35,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:35,455 INFO L93 Difference]: Finished difference Result 9757 states and 24151 transitions. [2021-06-05 13:43:35,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:43:35,456 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 13:43:35,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:35,465 INFO L225 Difference]: With dead ends: 9757 [2021-06-05 13:43:35,465 INFO L226 Difference]: Without dead ends: 9757 [2021-06-05 13:43:35,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:43:35,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9757 states. [2021-06-05 13:43:35,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9757 to 6769. [2021-06-05 13:43:35,567 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 13:43:35,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 17982 transitions. [2021-06-05 13:43:35,577 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 17982 transitions. Word has length 47 [2021-06-05 13:43:35,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:35,577 INFO L482 AbstractCegarLoop]: Abstraction has 6769 states and 17982 transitions. [2021-06-05 13:43:35,577 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 13:43:35,577 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 17982 transitions. [2021-06-05 13:43:35,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:35,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:35,582 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 13:43:35,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:35,783 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:35,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:35,783 INFO L82 PathProgramCache]: Analyzing trace with hash 492700136, now seen corresponding path program 44 times [2021-06-05 13:43:35,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:35,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872031891] [2021-06-05 13:43:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:35,845 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 13:43:35,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:35,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872031891] [2021-06-05 13:43:35,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872031891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:35,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374298319] [2021-06-05 13:43:35,846 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 13:43:35,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:35,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:35,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:35,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:35,961 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 13:43:35,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374298319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:35,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:35,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 13:43:35,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998897669] [2021-06-05 13:43:35,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:43:35,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:35,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:43:35,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:43:35,962 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 13:43:36,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:36,176 INFO L93 Difference]: Finished difference Result 8996 states and 22443 transitions. [2021-06-05 13:43:36,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:43:36,176 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 13:43:36,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:36,185 INFO L225 Difference]: With dead ends: 8996 [2021-06-05 13:43:36,186 INFO L226 Difference]: Without dead ends: 8996 [2021-06-05 13:43:36,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:36,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8996 states. [2021-06-05 13:43:36,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8996 to 6596. [2021-06-05 13:43:36,261 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 13:43:36,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 17477 transitions. [2021-06-05 13:43:36,270 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 17477 transitions. Word has length 47 [2021-06-05 13:43:36,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:36,270 INFO L482 AbstractCegarLoop]: Abstraction has 6596 states and 17477 transitions. [2021-06-05 13:43:36,270 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 13:43:36,270 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 17477 transitions. [2021-06-05 13:43:36,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:36,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:36,275 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 13:43:36,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-05 13:43:36,475 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:36,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:36,476 INFO L82 PathProgramCache]: Analyzing trace with hash 227806332, now seen corresponding path program 101 times [2021-06-05 13:43:36,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:36,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953992324] [2021-06-05 13:43:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:36,536 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 13:43:36,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:36,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953992324] [2021-06-05 13:43:36,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953992324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:36,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924718617] [2021-06-05 13:43:36,537 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 13:43:36,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:43:36,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:36,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:36,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:36,664 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 13:43:36,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924718617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:36,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:36,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2021-06-05 13:43:36,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44254725] [2021-06-05 13:43:36,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:36,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:36,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:36,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:36,665 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 13:43:36,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:36,876 INFO L93 Difference]: Finished difference Result 7771 states and 19586 transitions. [2021-06-05 13:43:36,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:43:36,876 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 13:43:36,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:36,884 INFO L225 Difference]: With dead ends: 7771 [2021-06-05 13:43:36,884 INFO L226 Difference]: Without dead ends: 7753 [2021-06-05 13:43:36,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:43:36,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7753 states. [2021-06-05 13:43:36,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7753 to 6596. [2021-06-05 13:43:36,949 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 13:43:36,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 17467 transitions. [2021-06-05 13:43:36,959 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 17467 transitions. Word has length 47 [2021-06-05 13:43:36,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:36,959 INFO L482 AbstractCegarLoop]: Abstraction has 6596 states and 17467 transitions. [2021-06-05 13:43:36,959 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 13:43:36,959 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 17467 transitions. [2021-06-05 13:43:36,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:36,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:36,964 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 13:43:37,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:37,164 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:37,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:37,165 INFO L82 PathProgramCache]: Analyzing trace with hash -866264581, now seen corresponding path program 45 times [2021-06-05 13:43:37,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:37,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371593573] [2021-06-05 13:43:37,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:37,252 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 13:43:37,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:37,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371593573] [2021-06-05 13:43:37,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371593573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:37,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083825061] [2021-06-05 13:43:37,253 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 13:43:37,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 13:43:37,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:37,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:43:37,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:37,504 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 13:43:37,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083825061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:37,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:37,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 21 [2021-06-05 13:43:37,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954942898] [2021-06-05 13:43:37,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:43:37,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:37,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:43:37,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:43:37,505 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 13:43:38,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:38,641 INFO L93 Difference]: Finished difference Result 8359 states and 20936 transitions. [2021-06-05 13:43:38,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 13:43:38,641 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 13:43:38,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:38,649 INFO L225 Difference]: With dead ends: 8359 [2021-06-05 13:43:38,650 INFO L226 Difference]: Without dead ends: 8301 [2021-06-05 13:43:38,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:43:38,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8301 states. [2021-06-05 13:43:38,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8301 to 6703. [2021-06-05 13:43:38,743 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 13:43:38,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6703 states to 6703 states and 17732 transitions. [2021-06-05 13:43:38,752 INFO L78 Accepts]: Start accepts. Automaton has 6703 states and 17732 transitions. Word has length 47 [2021-06-05 13:43:38,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:38,752 INFO L482 AbstractCegarLoop]: Abstraction has 6703 states and 17732 transitions. [2021-06-05 13:43:38,753 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 13:43:38,753 INFO L276 IsEmpty]: Start isEmpty. Operand 6703 states and 17732 transitions. [2021-06-05 13:43:38,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:38,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:38,757 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 13:43:38,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-06-05 13:43:38,958 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:38,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:38,958 INFO L82 PathProgramCache]: Analyzing trace with hash 634068411, now seen corresponding path program 102 times [2021-06-05 13:43:38,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:38,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459991947] [2021-06-05 13:43:38,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:39,037 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 13:43:39,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:39,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459991947] [2021-06-05 13:43:39,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459991947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:39,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879619899] [2021-06-05 13:43:39,038 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 13:43:39,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 13:43:39,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:39,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:43:39,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:39,166 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 13:43:39,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879619899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:39,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:39,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:43:39,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928326666] [2021-06-05 13:43:39,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:43:39,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:39,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:43:39,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:43:39,167 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 13:43:39,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:39,592 INFO L93 Difference]: Finished difference Result 7388 states and 18942 transitions. [2021-06-05 13:43:39,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:43:39,593 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 13:43:39,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:39,600 INFO L225 Difference]: With dead ends: 7388 [2021-06-05 13:43:39,601 INFO L226 Difference]: Without dead ends: 7332 [2021-06-05 13:43:39,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7332 states. [2021-06-05 13:43:39,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7332 to 6671. [2021-06-05 13:43:39,675 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 13:43:39,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6671 states to 6671 states and 17632 transitions. [2021-06-05 13:43:39,685 INFO L78 Accepts]: Start accepts. Automaton has 6671 states and 17632 transitions. Word has length 47 [2021-06-05 13:43:39,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:39,685 INFO L482 AbstractCegarLoop]: Abstraction has 6671 states and 17632 transitions. [2021-06-05 13:43:39,686 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 13:43:39,686 INFO L276 IsEmpty]: Start isEmpty. Operand 6671 states and 17632 transitions. [2021-06-05 13:43:39,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:39,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:39,691 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 13:43:39,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 13:43:39,891 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:39,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:39,892 INFO L82 PathProgramCache]: Analyzing trace with hash 20532231, now seen corresponding path program 103 times [2021-06-05 13:43:39,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:39,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330911331] [2021-06-05 13:43:39,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:39,963 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 13:43:39,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:39,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330911331] [2021-06-05 13:43:39,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330911331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:39,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992998296] [2021-06-05 13:43:39,964 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 13:43:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:39,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:43:39,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:40,060 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 13:43:40,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992998296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:40,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:40,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:43:40,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989605017] [2021-06-05 13:43:40,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:43:40,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:40,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:43:40,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:43:40,061 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 13:43:40,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:40,404 INFO L93 Difference]: Finished difference Result 7705 states and 19640 transitions. [2021-06-05 13:43:40,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:43:40,404 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 13:43:40,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:40,412 INFO L225 Difference]: With dead ends: 7705 [2021-06-05 13:43:40,412 INFO L226 Difference]: Without dead ends: 7693 [2021-06-05 13:43:40,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:40,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7693 states. [2021-06-05 13:43:40,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7693 to 6695. [2021-06-05 13:43:40,489 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 13:43:40,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 17686 transitions. [2021-06-05 13:43:40,499 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 17686 transitions. Word has length 47 [2021-06-05 13:43:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:40,499 INFO L482 AbstractCegarLoop]: Abstraction has 6695 states and 17686 transitions. [2021-06-05 13:43:40,499 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 13:43:40,499 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 17686 transitions. [2021-06-05 13:43:40,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:40,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:40,504 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 13:43:40,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable387,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:40,704 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:40,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:40,704 INFO L82 PathProgramCache]: Analyzing trace with hash -136767256, now seen corresponding path program 46 times [2021-06-05 13:43:40,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:40,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907059241] [2021-06-05 13:43:40,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:40,757 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 13:43:40,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:40,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907059241] [2021-06-05 13:43:40,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907059241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:40,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356484901] [2021-06-05 13:43:40,757 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 13:43:40,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:40,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:40,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:40,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:40,854 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 13:43:40,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356484901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:40,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:40,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 13:43:40,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455171757] [2021-06-05 13:43:40,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:43:40,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:40,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:43:40,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:43:40,855 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 13:43:41,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:41,021 INFO L93 Difference]: Finished difference Result 8625 states and 21596 transitions. [2021-06-05 13:43:41,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:43:41,021 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 13:43:41,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:41,030 INFO L225 Difference]: With dead ends: 8625 [2021-06-05 13:43:41,030 INFO L226 Difference]: Without dead ends: 8605 [2021-06-05 13:43:41,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:43:41,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8605 states. [2021-06-05 13:43:41,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8605 to 6862. [2021-06-05 13:43:41,116 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 13:43:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6862 states to 6862 states and 18150 transitions. [2021-06-05 13:43:41,126 INFO L78 Accepts]: Start accepts. Automaton has 6862 states and 18150 transitions. Word has length 47 [2021-06-05 13:43:41,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:41,126 INFO L482 AbstractCegarLoop]: Abstraction has 6862 states and 18150 transitions. [2021-06-05 13:43:41,126 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 13:43:41,126 INFO L276 IsEmpty]: Start isEmpty. Operand 6862 states and 18150 transitions. [2021-06-05 13:43:41,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:41,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:41,132 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 13:43:41,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 13:43:41,332 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:41,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:41,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1627825272, now seen corresponding path program 104 times [2021-06-05 13:43:41,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:41,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490544963] [2021-06-05 13:43:41,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:41,385 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 13:43:41,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:41,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490544963] [2021-06-05 13:43:41,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490544963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:41,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855009273] [2021-06-05 13:43:41,385 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 13:43:41,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:41,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:41,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:41,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:41,481 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 13:43:41,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855009273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:41,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:41,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:43:41,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63312462] [2021-06-05 13:43:41,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:43:41,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:41,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:43:41,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:43:41,482 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 13:43:41,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:41,662 INFO L93 Difference]: Finished difference Result 8135 states and 20382 transitions. [2021-06-05 13:43:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:41,663 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 13:43:41,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:41,672 INFO L225 Difference]: With dead ends: 8135 [2021-06-05 13:43:41,672 INFO L226 Difference]: Without dead ends: 8117 [2021-06-05 13:43:41,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:43:41,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-06-05 13:43:41,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6838. [2021-06-05 13:43:41,777 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 13:43:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6838 states to 6838 states and 18053 transitions. [2021-06-05 13:43:41,788 INFO L78 Accepts]: Start accepts. Automaton has 6838 states and 18053 transitions. Word has length 47 [2021-06-05 13:43:41,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:41,788 INFO L482 AbstractCegarLoop]: Abstraction has 6838 states and 18053 transitions. [2021-06-05 13:43:41,788 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 13:43:41,789 INFO L276 IsEmpty]: Start isEmpty. Operand 6838 states and 18053 transitions. [2021-06-05 13:43:41,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:41,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:41,797 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 13:43:42,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:42,005 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:42,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:42,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2132517731, now seen corresponding path program 105 times [2021-06-05 13:43:42,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:42,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950676574] [2021-06-05 13:43:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:42,073 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 13:43:42,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:42,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950676574] [2021-06-05 13:43:42,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950676574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:42,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927563288] [2021-06-05 13:43:42,074 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 13:43:42,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 13:43:42,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:42,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:43:42,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:42,178 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 13:43:42,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927563288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:42,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:42,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:43:42,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035881847] [2021-06-05 13:43:42,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:43:42,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:42,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:43:42,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:43:42,179 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 13:43:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:42,641 INFO L93 Difference]: Finished difference Result 8679 states and 21810 transitions. [2021-06-05 13:43:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:43:42,641 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 13:43:42,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:42,650 INFO L225 Difference]: With dead ends: 8679 [2021-06-05 13:43:42,650 INFO L226 Difference]: Without dead ends: 8637 [2021-06-05 13:43:42,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 148.8ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:43:42,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8637 states. [2021-06-05 13:43:42,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8637 to 6900. [2021-06-05 13:43:42,732 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 13:43:42,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 18219 transitions. [2021-06-05 13:43:42,743 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 18219 transitions. Word has length 47 [2021-06-05 13:43:42,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:42,743 INFO L482 AbstractCegarLoop]: Abstraction has 6900 states and 18219 transitions. [2021-06-05 13:43:42,743 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 13:43:42,743 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 18219 transitions. [2021-06-05 13:43:42,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:42,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:42,748 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 13:43:42,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:42,949 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:42,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:42,949 INFO L82 PathProgramCache]: Analyzing trace with hash -599958622, now seen corresponding path program 106 times [2021-06-05 13:43:42,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:42,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997547148] [2021-06-05 13:43:42,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:43,010 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 13:43:43,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:43,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997547148] [2021-06-05 13:43:43,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997547148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:43,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966581838] [2021-06-05 13:43:43,010 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 13:43:43,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:43,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:43,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:43,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:43,108 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 13:43:43,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966581838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:43,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:43,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 13:43:43,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29807767] [2021-06-05 13:43:43,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:43:43,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:43,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:43:43,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:43:43,109 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 13:43:43,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:43,309 INFO L93 Difference]: Finished difference Result 8193 states and 20486 transitions. [2021-06-05 13:43:43,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:43,309 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 13:43:43,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:43,318 INFO L225 Difference]: With dead ends: 8193 [2021-06-05 13:43:43,319 INFO L226 Difference]: Without dead ends: 8169 [2021-06-05 13:43:43,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:43:43,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8169 states. [2021-06-05 13:43:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8169 to 6661. [2021-06-05 13:43:43,398 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 13:43:43,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6661 states to 6661 states and 17512 transitions. [2021-06-05 13:43:43,408 INFO L78 Accepts]: Start accepts. Automaton has 6661 states and 17512 transitions. Word has length 47 [2021-06-05 13:43:43,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:43,408 INFO L482 AbstractCegarLoop]: Abstraction has 6661 states and 17512 transitions. [2021-06-05 13:43:43,408 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 13:43:43,408 INFO L276 IsEmpty]: Start isEmpty. Operand 6661 states and 17512 transitions. [2021-06-05 13:43:43,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:43,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:43,414 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 13:43:43,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:43,614 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:43,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:43,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1977681197, now seen corresponding path program 107 times [2021-06-05 13:43:43,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:43,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295833172] [2021-06-05 13:43:43,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:43,696 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 13:43:43,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:43,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295833172] [2021-06-05 13:43:43,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295833172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:43,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245135503] [2021-06-05 13:43:43,696 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 13:43:43,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 13:43:43,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:43,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:43:43,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:43,836 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 13:43:43,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245135503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:43,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:43,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:43:43,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059809633] [2021-06-05 13:43:43,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:43:43,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:43,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:43:43,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:43:43,837 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 13:43:44,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:44,286 INFO L93 Difference]: Finished difference Result 8662 states and 21553 transitions. [2021-06-05 13:43:44,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:43:44,286 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 13:43:44,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:44,295 INFO L225 Difference]: With dead ends: 8662 [2021-06-05 13:43:44,295 INFO L226 Difference]: Without dead ends: 8608 [2021-06-05 13:43:44,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:43:44,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8608 states. [2021-06-05 13:43:44,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8608 to 6632. [2021-06-05 13:43:44,373 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 13:43:44,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6632 states to 6632 states and 17410 transitions. [2021-06-05 13:43:44,383 INFO L78 Accepts]: Start accepts. Automaton has 6632 states and 17410 transitions. Word has length 47 [2021-06-05 13:43:44,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:44,383 INFO L482 AbstractCegarLoop]: Abstraction has 6632 states and 17410 transitions. [2021-06-05 13:43:44,383 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 13:43:44,383 INFO L276 IsEmpty]: Start isEmpty. Operand 6632 states and 17410 transitions. [2021-06-05 13:43:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:44,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:44,388 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 13:43:44,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 13:43:44,589 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:44,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:44,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1457344172, now seen corresponding path program 47 times [2021-06-05 13:43:44,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:44,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442094464] [2021-06-05 13:43:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:44,646 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 13:43:44,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:44,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442094464] [2021-06-05 13:43:44,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442094464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:44,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768695134] [2021-06-05 13:43:44,646 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 13:43:44,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 13:43:44,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:44,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:44,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:44,810 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 13:43:44,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768695134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:44,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:44,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 17 [2021-06-05 13:43:44,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202173037] [2021-06-05 13:43:44,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:43:44,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:44,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:43:44,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:43:44,811 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 13:43:45,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:45,161 INFO L93 Difference]: Finished difference Result 10971 states and 26933 transitions. [2021-06-05 13:43:45,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:43:45,162 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 13:43:45,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:45,173 INFO L225 Difference]: With dead ends: 10971 [2021-06-05 13:43:45,173 INFO L226 Difference]: Without dead ends: 10971 [2021-06-05 13:43:45,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:43:45,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10971 states. [2021-06-05 13:43:45,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10971 to 6822. [2021-06-05 13:43:45,272 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 13:43:45,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 17990 transitions. [2021-06-05 13:43:45,282 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 17990 transitions. Word has length 47 [2021-06-05 13:43:45,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:45,282 INFO L482 AbstractCegarLoop]: Abstraction has 6822 states and 17990 transitions. [2021-06-05 13:43:45,282 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 13:43:45,282 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 17990 transitions. [2021-06-05 13:43:45,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:45,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:45,287 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 13:43:45,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable400,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:45,487 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:45,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:45,487 INFO L82 PathProgramCache]: Analyzing trace with hash -180228284, now seen corresponding path program 48 times [2021-06-05 13:43:45,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:45,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86839285] [2021-06-05 13:43:45,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:45,548 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 13:43:45,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:45,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86839285] [2021-06-05 13:43:45,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86839285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:45,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483269143] [2021-06-05 13:43:45,548 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 13:43:45,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 13:43:45,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:45,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:45,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:45,656 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 13:43:45,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483269143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:45,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:45,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 13:43:45,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097658389] [2021-06-05 13:43:45,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:43:45,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:45,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:43:45,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:43:45,657 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 13:43:45,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:45,905 INFO L93 Difference]: Finished difference Result 10273 states and 25277 transitions. [2021-06-05 13:43:45,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:43:45,905 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 13:43:45,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:45,917 INFO L225 Difference]: With dead ends: 10273 [2021-06-05 13:43:45,917 INFO L226 Difference]: Without dead ends: 10273 [2021-06-05 13:43:45,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:45,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10273 states. [2021-06-05 13:43:46,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10273 to 6822. [2021-06-05 13:43:46,009 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 13:43:46,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 17984 transitions. [2021-06-05 13:43:46,019 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 17984 transitions. Word has length 47 [2021-06-05 13:43:46,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:46,020 INFO L482 AbstractCegarLoop]: Abstraction has 6822 states and 17984 transitions. [2021-06-05 13:43:46,020 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 13:43:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 17984 transitions. [2021-06-05 13:43:46,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:46,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:46,024 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 13:43:46,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:46,225 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:46,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:46,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1870223448, now seen corresponding path program 49 times [2021-06-05 13:43:46,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:46,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713376516] [2021-06-05 13:43:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:46,297 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 13:43:46,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:46,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713376516] [2021-06-05 13:43:46,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713376516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:46,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817796848] [2021-06-05 13:43:46,297 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 13:43:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:46,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:46,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:46,400 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 13:43:46,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817796848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:46,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:46,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 13:43:46,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277927942] [2021-06-05 13:43:46,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:43:46,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:46,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:43:46,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:43:46,401 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 13:43:46,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:46,645 INFO L93 Difference]: Finished difference Result 8962 states and 22325 transitions. [2021-06-05 13:43:46,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:43:46,646 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 13:43:46,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:46,655 INFO L225 Difference]: With dead ends: 8962 [2021-06-05 13:43:46,656 INFO L226 Difference]: Without dead ends: 8962 [2021-06-05 13:43:46,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:43:46,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8962 states. [2021-06-05 13:43:46,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8962 to 6635. [2021-06-05 13:43:46,738 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 13:43:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 17481 transitions. [2021-06-05 13:43:46,748 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 17481 transitions. Word has length 47 [2021-06-05 13:43:46,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:46,748 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 17481 transitions. [2021-06-05 13:43:46,748 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 13:43:46,748 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 17481 transitions. [2021-06-05 13:43:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:46,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:46,753 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 13:43:46,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-05 13:43:46,953 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:46,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:46,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1591078520, now seen corresponding path program 108 times [2021-06-05 13:43:46,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:46,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058605318] [2021-06-05 13:43:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:47,034 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 13:43:47,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:47,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058605318] [2021-06-05 13:43:47,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058605318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:47,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646144753] [2021-06-05 13:43:47,034 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 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 13:43:47,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:43:47,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:47,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:47,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:47,152 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 13:43:47,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646144753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:47,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:47,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:43:47,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070004844] [2021-06-05 13:43:47,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:43:47,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:47,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:43:47,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:43:47,153 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 13:43:47,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:47,345 INFO L93 Difference]: Finished difference Result 7750 states and 19446 transitions. [2021-06-05 13:43:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:43:47,346 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 13:43:47,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:47,353 INFO L225 Difference]: With dead ends: 7750 [2021-06-05 13:43:47,354 INFO L226 Difference]: Without dead ends: 7723 [2021-06-05 13:43:47,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:47,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7723 states. [2021-06-05 13:43:47,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7723 to 6635. [2021-06-05 13:43:47,428 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 13:43:47,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 17475 transitions. [2021-06-05 13:43:47,438 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 17475 transitions. Word has length 47 [2021-06-05 13:43:47,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:47,438 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 17475 transitions. [2021-06-05 13:43:47,438 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 13:43:47,438 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 17475 transitions. [2021-06-05 13:43:47,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:47,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:47,443 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 13:43:47,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:47,643 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:47,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:47,643 INFO L82 PathProgramCache]: Analyzing trace with hash 890204437, now seen corresponding path program 50 times [2021-06-05 13:43:47,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:47,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139586732] [2021-06-05 13:43:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:47,716 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 13:43:47,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:47,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139586732] [2021-06-05 13:43:47,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139586732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:47,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202120764] [2021-06-05 13:43:47,717 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 13:43:47,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:47,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:47,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:43:47,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:47,815 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 13:43:47,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202120764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:47,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:47,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:43:47,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701164921] [2021-06-05 13:43:47,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:43:47,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:47,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:43:47,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:43:47,816 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 13:43:48,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:48,188 INFO L93 Difference]: Finished difference Result 7795 states and 19769 transitions. [2021-06-05 13:43:48,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:43:48,189 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 13:43:48,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:48,196 INFO L225 Difference]: With dead ends: 7795 [2021-06-05 13:43:48,197 INFO L226 Difference]: Without dead ends: 7771 [2021-06-05 13:43:48,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:48,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7771 states. [2021-06-05 13:43:48,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7771 to 6763. [2021-06-05 13:43:48,275 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 13:43:48,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 17786 transitions. [2021-06-05 13:43:48,285 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 17786 transitions. Word has length 47 [2021-06-05 13:43:48,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:48,285 INFO L482 AbstractCegarLoop]: Abstraction has 6763 states and 17786 transitions. [2021-06-05 13:43:48,285 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 13:43:48,285 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 17786 transitions. [2021-06-05 13:43:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:48,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:48,290 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 13:43:48,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-05 13:43:48,491 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:48,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:48,491 INFO L82 PathProgramCache]: Analyzing trace with hash -663492420, now seen corresponding path program 109 times [2021-06-05 13:43:48,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:48,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36570019] [2021-06-05 13:43:48,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:48,544 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 13:43:48,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:48,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36570019] [2021-06-05 13:43:48,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36570019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:48,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578590008] [2021-06-05 13:43:48,544 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 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 13:43:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:48,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:48,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:48,650 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 13:43:48,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578590008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:48,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:48,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 13:43:48,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073934088] [2021-06-05 13:43:48,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:43:48,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:48,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:43:48,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:43:48,651 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 13:43:48,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:48,779 INFO L93 Difference]: Finished difference Result 8122 states and 20221 transitions. [2021-06-05 13:43:48,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:43:48,779 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 13:43:48,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:48,787 INFO L225 Difference]: With dead ends: 8122 [2021-06-05 13:43:48,787 INFO L226 Difference]: Without dead ends: 8119 [2021-06-05 13:43:48,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:43:48,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8119 states. [2021-06-05 13:43:48,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8119 to 6755. [2021-06-05 13:43:48,861 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 13:43:48,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 17752 transitions. [2021-06-05 13:43:48,871 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 17752 transitions. Word has length 47 [2021-06-05 13:43:48,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:48,871 INFO L482 AbstractCegarLoop]: Abstraction has 6755 states and 17752 transitions. [2021-06-05 13:43:48,871 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 13:43:48,871 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 17752 transitions. [2021-06-05 13:43:48,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:48,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:48,876 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 13:43:49,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:49,076 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:49,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:49,076 INFO L82 PathProgramCache]: Analyzing trace with hash -456429854, now seen corresponding path program 110 times [2021-06-05 13:43:49,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:49,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17195892] [2021-06-05 13:43:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:49,139 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 13:43:49,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:49,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17195892] [2021-06-05 13:43:49,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17195892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:49,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304028566] [2021-06-05 13:43:49,139 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 13:43:49,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:49,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:49,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:49,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:49,249 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 13:43:49,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304028566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:49,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:49,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:43:49,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679638641] [2021-06-05 13:43:49,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:43:49,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:49,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:43:49,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:43:49,253 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 13:43:49,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:49,410 INFO L93 Difference]: Finished difference Result 8150 states and 20236 transitions. [2021-06-05 13:43:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:49,410 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 13:43:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:49,418 INFO L225 Difference]: With dead ends: 8150 [2021-06-05 13:43:49,418 INFO L226 Difference]: Without dead ends: 8132 [2021-06-05 13:43:49,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:43:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8132 states. [2021-06-05 13:43:49,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8132 to 6755. [2021-06-05 13:43:49,486 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 13:43:49,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 17732 transitions. [2021-06-05 13:43:49,495 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 17732 transitions. Word has length 47 [2021-06-05 13:43:49,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:49,495 INFO L482 AbstractCegarLoop]: Abstraction has 6755 states and 17732 transitions. [2021-06-05 13:43:49,495 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 13:43:49,495 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 17732 transitions. [2021-06-05 13:43:49,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:49,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:49,499 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 13:43:49,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 13:43:49,699 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:49,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:49,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1904429867, now seen corresponding path program 111 times [2021-06-05 13:43:49,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:49,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793748483] [2021-06-05 13:43:49,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:49,767 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 13:43:49,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:49,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793748483] [2021-06-05 13:43:49,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793748483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:49,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665074822] [2021-06-05 13:43:49,767 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 13:43:49,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 13:43:49,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:49,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:43:49,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:49,885 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 13:43:49,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665074822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:49,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:49,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:43:49,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976763590] [2021-06-05 13:43:49,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:43:49,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:49,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:43:49,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:43:49,886 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 13:43:50,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:50,361 INFO L93 Difference]: Finished difference Result 7412 states and 18888 transitions. [2021-06-05 13:43:50,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:43:50,361 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 13:43:50,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:50,369 INFO L225 Difference]: With dead ends: 7412 [2021-06-05 13:43:50,369 INFO L226 Difference]: Without dead ends: 7338 [2021-06-05 13:43:50,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:50,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7338 states. [2021-06-05 13:43:50,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7338 to 6729. [2021-06-05 13:43:50,444 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 13:43:50,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6729 states to 6729 states and 17635 transitions. [2021-06-05 13:43:50,454 INFO L78 Accepts]: Start accepts. Automaton has 6729 states and 17635 transitions. Word has length 47 [2021-06-05 13:43:50,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:50,454 INFO L482 AbstractCegarLoop]: Abstraction has 6729 states and 17635 transitions. [2021-06-05 13:43:50,454 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 13:43:50,454 INFO L276 IsEmpty]: Start isEmpty. Operand 6729 states and 17635 transitions. [2021-06-05 13:43:50,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:50,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:50,459 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 13:43:50,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-05 13:43:50,660 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:50,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:50,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1777001249, now seen corresponding path program 112 times [2021-06-05 13:43:50,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:50,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326250746] [2021-06-05 13:43:50,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:50,732 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 13:43:50,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:50,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326250746] [2021-06-05 13:43:50,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326250746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:50,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141903768] [2021-06-05 13:43:50,732 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 13:43:50,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:50,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:50,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:43:50,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:50,829 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 13:43:50,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141903768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:50,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:50,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:43:50,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679175069] [2021-06-05 13:43:50,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:43:50,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:50,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:43:50,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:43:50,830 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 13:43:51,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:51,171 INFO L93 Difference]: Finished difference Result 7761 states and 19651 transitions. [2021-06-05 13:43:51,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:43:51,171 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 13:43:51,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:51,179 INFO L225 Difference]: With dead ends: 7761 [2021-06-05 13:43:51,179 INFO L226 Difference]: Without dead ends: 7749 [2021-06-05 13:43:51,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:51,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7749 states. [2021-06-05 13:43:51,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7749 to 6765. [2021-06-05 13:43:51,260 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 13:43:51,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6765 states to 6765 states and 17720 transitions. [2021-06-05 13:43:51,270 INFO L78 Accepts]: Start accepts. Automaton has 6765 states and 17720 transitions. Word has length 47 [2021-06-05 13:43:51,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:51,270 INFO L482 AbstractCegarLoop]: Abstraction has 6765 states and 17720 transitions. [2021-06-05 13:43:51,270 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 13:43:51,270 INFO L276 IsEmpty]: Start isEmpty. Operand 6765 states and 17720 transitions. [2021-06-05 13:43:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:51,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:51,275 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 13:43:51,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:51,475 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:51,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:51,475 INFO L82 PathProgramCache]: Analyzing trace with hash -376048713, now seen corresponding path program 113 times [2021-06-05 13:43:51,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:51,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966866924] [2021-06-05 13:43:51,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:51,545 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 13:43:51,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:51,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966866924] [2021-06-05 13:43:51,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966866924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:51,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474022609] [2021-06-05 13:43:51,546 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 13:43:51,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 13:43:51,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:51,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:43:51,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:51,646 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 13:43:51,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474022609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:51,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:51,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:43:51,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623834843] [2021-06-05 13:43:51,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:43:51,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:51,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:43:51,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:43:51,647 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 13:43:52,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:52,153 INFO L93 Difference]: Finished difference Result 8961 states and 22249 transitions. [2021-06-05 13:43:52,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:43:52,153 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 13:43:52,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:52,163 INFO L225 Difference]: With dead ends: 8961 [2021-06-05 13:43:52,164 INFO L226 Difference]: Without dead ends: 8907 [2021-06-05 13:43:52,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 168.6ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:43:52,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8907 states. [2021-06-05 13:43:52,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8907 to 6885. [2021-06-05 13:43:52,254 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 13:43:52,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6885 states to 6885 states and 18035 transitions. [2021-06-05 13:43:52,266 INFO L78 Accepts]: Start accepts. Automaton has 6885 states and 18035 transitions. Word has length 47 [2021-06-05 13:43:52,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:52,266 INFO L482 AbstractCegarLoop]: Abstraction has 6885 states and 18035 transitions. [2021-06-05 13:43:52,266 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 13:43:52,266 INFO L276 IsEmpty]: Start isEmpty. Operand 6885 states and 18035 transitions. [2021-06-05 13:43:52,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:52,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:52,271 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 13:43:52,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:52,472 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:52,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:52,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1156510396, now seen corresponding path program 114 times [2021-06-05 13:43:52,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:52,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060927766] [2021-06-05 13:43:52,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:52,534 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 13:43:52,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:52,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060927766] [2021-06-05 13:43:52,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060927766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:52,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233018579] [2021-06-05 13:43:52,534 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 13:43:52,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 13:43:52,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:52,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:52,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:52,652 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 13:43:52,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233018579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:52,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:52,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 13:43:52,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314527518] [2021-06-05 13:43:52,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:43:52,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:52,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:43:52,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:43:52,653 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 13:43:52,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:52,837 INFO L93 Difference]: Finished difference Result 8306 states and 20557 transitions. [2021-06-05 13:43:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:52,837 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 13:43:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:52,846 INFO L225 Difference]: With dead ends: 8306 [2021-06-05 13:43:52,847 INFO L226 Difference]: Without dead ends: 8282 [2021-06-05 13:43:52,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:43:52,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8282 states. [2021-06-05 13:43:52,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8282 to 6885. [2021-06-05 13:43:52,932 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 13:43:52,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6885 states to 6885 states and 18021 transitions. [2021-06-05 13:43:52,943 INFO L78 Accepts]: Start accepts. Automaton has 6885 states and 18021 transitions. Word has length 47 [2021-06-05 13:43:52,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:52,943 INFO L482 AbstractCegarLoop]: Abstraction has 6885 states and 18021 transitions. [2021-06-05 13:43:52,943 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 13:43:52,943 INFO L276 IsEmpty]: Start isEmpty. Operand 6885 states and 18021 transitions. [2021-06-05 13:43:52,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:52,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:52,948 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 13:43:53,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:53,149 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:53,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:53,149 INFO L82 PathProgramCache]: Analyzing trace with hash -221212179, now seen corresponding path program 115 times [2021-06-05 13:43:53,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:53,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429689538] [2021-06-05 13:43:53,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:53,244 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 13:43:53,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:53,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429689538] [2021-06-05 13:43:53,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429689538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:53,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785732027] [2021-06-05 13:43:53,244 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 13:43:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:53,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:43:53,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:53,343 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 13:43:53,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785732027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:53,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:53,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:43:53,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421113482] [2021-06-05 13:43:53,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:43:53,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:53,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:43:53,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:43:53,344 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 13:43:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:53,993 INFO L93 Difference]: Finished difference Result 10707 states and 26088 transitions. [2021-06-05 13:43:53,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 13:43:53,993 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 13:43:53,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:54,006 INFO L225 Difference]: With dead ends: 10707 [2021-06-05 13:43:54,007 INFO L226 Difference]: Without dead ends: 10593 [2021-06-05 13:43:54,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:43:54,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10593 states. [2021-06-05 13:43:54,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10593 to 7009. [2021-06-05 13:43:54,140 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 13:43:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7009 states to 7009 states and 18346 transitions. [2021-06-05 13:43:54,152 INFO L78 Accepts]: Start accepts. Automaton has 7009 states and 18346 transitions. Word has length 47 [2021-06-05 13:43:54,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:54,152 INFO L482 AbstractCegarLoop]: Abstraction has 7009 states and 18346 transitions. [2021-06-05 13:43:54,152 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 13:43:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 7009 states and 18346 transitions. [2021-06-05 13:43:54,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:54,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:54,158 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 13:43:54,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 13:43:54,359 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:54,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:54,359 INFO L82 PathProgramCache]: Analyzing trace with hash 165390498, now seen corresponding path program 116 times [2021-06-05 13:43:54,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:54,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760634116] [2021-06-05 13:43:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:54,428 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 13:43:54,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:54,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760634116] [2021-06-05 13:43:54,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760634116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:54,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646241787] [2021-06-05 13:43:54,429 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 13:43:54,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:54,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:54,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:54,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:54,534 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 13:43:54,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646241787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:54,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:54,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:43:54,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787173484] [2021-06-05 13:43:54,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:43:54,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:54,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:43:54,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:43:54,535 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 13:43:54,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:54,765 INFO L93 Difference]: Finished difference Result 8467 states and 20934 transitions. [2021-06-05 13:43:54,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:43:54,766 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 13:43:54,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:54,776 INFO L225 Difference]: With dead ends: 8467 [2021-06-05 13:43:54,776 INFO L226 Difference]: Without dead ends: 8434 [2021-06-05 13:43:54,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:54,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8434 states. [2021-06-05 13:43:54,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8434 to 6781. [2021-06-05 13:43:54,860 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 13:43:54,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6781 states to 6781 states and 17678 transitions. [2021-06-05 13:43:54,871 INFO L78 Accepts]: Start accepts. Automaton has 6781 states and 17678 transitions. Word has length 47 [2021-06-05 13:43:54,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:54,871 INFO L482 AbstractCegarLoop]: Abstraction has 6781 states and 17678 transitions. [2021-06-05 13:43:54,871 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 13:43:54,871 INFO L276 IsEmpty]: Start isEmpty. Operand 6781 states and 17678 transitions. [2021-06-05 13:43:54,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:54,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:54,876 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 13:43:55,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 13:43:55,077 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:55,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:55,077 INFO L82 PathProgramCache]: Analyzing trace with hash -280903689, now seen corresponding path program 117 times [2021-06-05 13:43:55,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:55,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232287967] [2021-06-05 13:43:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:55,167 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 13:43:55,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:55,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232287967] [2021-06-05 13:43:55,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232287967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:55,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066530097] [2021-06-05 13:43:55,167 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 13:43:55,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 13:43:55,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:55,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:43:55,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:55,272 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 13:43:55,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066530097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:55,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:55,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:43:55,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688772558] [2021-06-05 13:43:55,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:43:55,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:55,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:43:55,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:43:55,273 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 13:43:55,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:55,779 INFO L93 Difference]: Finished difference Result 9528 states and 23213 transitions. [2021-06-05 13:43:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:43:55,779 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 13:43:55,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:55,789 INFO L225 Difference]: With dead ends: 9528 [2021-06-05 13:43:55,789 INFO L226 Difference]: Without dead ends: 9372 [2021-06-05 13:43:55,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 209.6ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:43:55,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9372 states. [2021-06-05 13:43:55,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9372 to 6516. [2021-06-05 13:43:55,874 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 13:43:55,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6516 states to 6516 states and 16949 transitions. [2021-06-05 13:43:55,884 INFO L78 Accepts]: Start accepts. Automaton has 6516 states and 16949 transitions. Word has length 47 [2021-06-05 13:43:55,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:55,884 INFO L482 AbstractCegarLoop]: Abstraction has 6516 states and 16949 transitions. [2021-06-05 13:43:55,884 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 13:43:55,884 INFO L276 IsEmpty]: Start isEmpty. Operand 6516 states and 16949 transitions. [2021-06-05 13:43:55,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:55,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:55,889 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 13:43:56,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:56,090 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:56,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:56,090 INFO L82 PathProgramCache]: Analyzing trace with hash -518965206, now seen corresponding path program 51 times [2021-06-05 13:43:56,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:56,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519007454] [2021-06-05 13:43:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:56,143 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 13:43:56,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:56,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519007454] [2021-06-05 13:43:56,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519007454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:56,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433487598] [2021-06-05 13:43:56,143 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 13:43:56,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 13:43:56,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:56,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:56,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:56,252 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 13:43:56,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433487598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:56,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:56,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 13:43:56,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683594254] [2021-06-05 13:43:56,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:43:56,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:56,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:43:56,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:43:56,253 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 13:43:56,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:56,439 INFO L93 Difference]: Finished difference Result 8372 states and 20874 transitions. [2021-06-05 13:43:56,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:43:56,439 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 13:43:56,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:56,448 INFO L225 Difference]: With dead ends: 8372 [2021-06-05 13:43:56,448 INFO L226 Difference]: Without dead ends: 8356 [2021-06-05 13:43:56,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:43:56,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8356 states. [2021-06-05 13:43:56,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8356 to 6760. [2021-06-05 13:43:56,533 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 13:43:56,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6760 states to 6760 states and 17612 transitions. [2021-06-05 13:43:56,543 INFO L78 Accepts]: Start accepts. Automaton has 6760 states and 17612 transitions. Word has length 47 [2021-06-05 13:43:56,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:56,543 INFO L482 AbstractCegarLoop]: Abstraction has 6760 states and 17612 transitions. [2021-06-05 13:43:56,543 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 13:43:56,543 INFO L276 IsEmpty]: Start isEmpty. Operand 6760 states and 17612 transitions. [2021-06-05 13:43:56,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:56,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:56,549 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 13:43:56,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-06-05 13:43:56,749 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:56,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:56,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1140845616, now seen corresponding path program 52 times [2021-06-05 13:43:56,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:56,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011273680] [2021-06-05 13:43:56,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:56,808 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 13:43:56,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:56,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011273680] [2021-06-05 13:43:56,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011273680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:56,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224360467] [2021-06-05 13:43:56,808 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 13:43:56,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:56,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:56,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:56,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:56,912 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 13:43:56,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224360467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:56,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:56,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 13:43:56,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019984434] [2021-06-05 13:43:56,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:43:56,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:56,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:43:56,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:43:56,913 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 13:43:57,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:57,113 INFO L93 Difference]: Finished difference Result 10200 states and 25050 transitions. [2021-06-05 13:43:57,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:43:57,113 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 13:43:57,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:57,124 INFO L225 Difference]: With dead ends: 10200 [2021-06-05 13:43:57,124 INFO L226 Difference]: Without dead ends: 10200 [2021-06-05 13:43:57,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:57,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10200 states. [2021-06-05 13:43:57,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10200 to 6771. [2021-06-05 13:43:57,233 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 13:43:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6771 states to 6771 states and 17645 transitions. [2021-06-05 13:43:57,243 INFO L78 Accepts]: Start accepts. Automaton has 6771 states and 17645 transitions. Word has length 47 [2021-06-05 13:43:57,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:57,243 INFO L482 AbstractCegarLoop]: Abstraction has 6771 states and 17645 transitions. [2021-06-05 13:43:57,243 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 13:43:57,243 INFO L276 IsEmpty]: Start isEmpty. Operand 6771 states and 17645 transitions. [2021-06-05 13:43:57,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:57,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:57,248 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 13:43:57,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 13:43:57,449 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:57,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:57,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1516549224, now seen corresponding path program 53 times [2021-06-05 13:43:57,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:57,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890812093] [2021-06-05 13:43:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:57,511 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 13:43:57,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:57,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890812093] [2021-06-05 13:43:57,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890812093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:57,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076648376] [2021-06-05 13:43:57,511 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 13:43:57,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 13:43:57,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:57,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:57,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:57,705 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 13:43:57,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076648376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:57,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:57,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 19 [2021-06-05 13:43:57,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824828965] [2021-06-05 13:43:57,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:43:57,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:57,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:43:57,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:43:57,706 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 13:43:58,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:58,174 INFO L93 Difference]: Finished difference Result 11339 states and 27631 transitions. [2021-06-05 13:43:58,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:43:58,175 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 13:43:58,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:58,187 INFO L225 Difference]: With dead ends: 11339 [2021-06-05 13:43:58,187 INFO L226 Difference]: Without dead ends: 11339 [2021-06-05 13:43:58,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 304.4ms TimeCoverageRelationStatistics Valid=369, Invalid=623, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:43:58,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11339 states. [2021-06-05 13:43:58,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11339 to 6800. [2021-06-05 13:43:58,282 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 13:43:58,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6800 states to 6800 states and 17737 transitions. [2021-06-05 13:43:58,292 INFO L78 Accepts]: Start accepts. Automaton has 6800 states and 17737 transitions. Word has length 47 [2021-06-05 13:43:58,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:58,292 INFO L482 AbstractCegarLoop]: Abstraction has 6800 states and 17737 transitions. [2021-06-05 13:43:58,292 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 13:43:58,292 INFO L276 IsEmpty]: Start isEmpty. Operand 6800 states and 17737 transitions. [2021-06-05 13:43:58,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:58,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:58,297 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 13:43:58,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:58,498 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:58,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:58,498 INFO L82 PathProgramCache]: Analyzing trace with hash -173445940, now seen corresponding path program 54 times [2021-06-05 13:43:58,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:58,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029612233] [2021-06-05 13:43:58,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:58,569 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 13:43:58,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:58,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029612233] [2021-06-05 13:43:58,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029612233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:58,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250479992] [2021-06-05 13:43:58,569 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 13:43:58,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 13:43:58,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:58,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:58,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:58,676 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 13:43:58,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250479992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:58,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:58,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 13:43:58,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826764786] [2021-06-05 13:43:58,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:43:58,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:58,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:43:58,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:43:58,677 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 13:43:58,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:58,968 INFO L93 Difference]: Finished difference Result 10003 states and 24584 transitions. [2021-06-05 13:43:58,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:43:58,968 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 13:43:58,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:58,980 INFO L225 Difference]: With dead ends: 10003 [2021-06-05 13:43:58,980 INFO L226 Difference]: Without dead ends: 10003 [2021-06-05 13:43:58,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:43:58,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10003 states. [2021-06-05 13:43:59,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10003 to 6809. [2021-06-05 13:43:59,071 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 13:43:59,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6809 states to 6809 states and 17759 transitions. [2021-06-05 13:43:59,082 INFO L78 Accepts]: Start accepts. Automaton has 6809 states and 17759 transitions. Word has length 47 [2021-06-05 13:43:59,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:59,082 INFO L482 AbstractCegarLoop]: Abstraction has 6809 states and 17759 transitions. [2021-06-05 13:43:59,082 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 13:43:59,082 INFO L276 IsEmpty]: Start isEmpty. Operand 6809 states and 17759 transitions. [2021-06-05 13:43:59,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:59,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:59,087 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 13:43:59,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 13:43:59,287 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:59,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:59,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1212732952, now seen corresponding path program 55 times [2021-06-05 13:43:59,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:59,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926655622] [2021-06-05 13:43:59,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:59,374 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 13:43:59,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:59,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926655622] [2021-06-05 13:43:59,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926655622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:59,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699489972] [2021-06-05 13:43:59,374 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 13:43:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:59,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:59,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:59,487 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 13:43:59,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699489972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:59,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:59,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:43:59,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766464059] [2021-06-05 13:43:59,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:43:59,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:59,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:43:59,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:43:59,488 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 13:43:59,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:59,792 INFO L93 Difference]: Finished difference Result 8634 states and 21474 transitions. [2021-06-05 13:43:59,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:43:59,792 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 13:43:59,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:59,801 INFO L225 Difference]: With dead ends: 8634 [2021-06-05 13:43:59,802 INFO L226 Difference]: Without dead ends: 8634 [2021-06-05 13:43:59,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:43:59,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8634 states. [2021-06-05 13:43:59,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8634 to 6442. [2021-06-05 13:43:59,875 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 13:43:59,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6442 states to 6442 states and 16765 transitions. [2021-06-05 13:43:59,883 INFO L78 Accepts]: Start accepts. Automaton has 6442 states and 16765 transitions. Word has length 47 [2021-06-05 13:43:59,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:59,883 INFO L482 AbstractCegarLoop]: Abstraction has 6442 states and 16765 transitions. [2021-06-05 13:43:59,883 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 13:43:59,883 INFO L276 IsEmpty]: Start isEmpty. Operand 6442 states and 16765 transitions. [2021-06-05 13:43:59,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:43:59,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:59,887 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 13:44:00,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 13:44:00,088 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:00,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:00,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1612669180, now seen corresponding path program 118 times [2021-06-05 13:44:00,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:00,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372230773] [2021-06-05 13:44:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:00,214 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 13:44:00,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:00,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372230773] [2021-06-05 13:44:00,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372230773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:00,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071060770] [2021-06-05 13:44:00,214 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 13:44:00,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:00,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:00,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:00,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:00,317 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 13:44:00,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071060770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:00,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:00,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:44:00,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449345966] [2021-06-05 13:44:00,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:44:00,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:00,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:44:00,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:00,318 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 13:44:00,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:00,536 INFO L93 Difference]: Finished difference Result 7636 states and 18887 transitions. [2021-06-05 13:44:00,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:44:00,537 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 13:44:00,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:00,545 INFO L225 Difference]: With dead ends: 7636 [2021-06-05 13:44:00,545 INFO L226 Difference]: Without dead ends: 7600 [2021-06-05 13:44:00,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:44:00,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7600 states. [2021-06-05 13:44:00,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7600 to 6442. [2021-06-05 13:44:00,617 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 13:44:00,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6442 states to 6442 states and 16759 transitions. [2021-06-05 13:44:00,626 INFO L78 Accepts]: Start accepts. Automaton has 6442 states and 16759 transitions. Word has length 47 [2021-06-05 13:44:00,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:00,626 INFO L482 AbstractCegarLoop]: Abstraction has 6442 states and 16759 transitions. [2021-06-05 13:44:00,626 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 13:44:00,626 INFO L276 IsEmpty]: Start isEmpty. Operand 6442 states and 16759 transitions. [2021-06-05 13:44:00,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:00,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:00,630 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 13:44:00,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 13:44:00,830 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:00,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:00,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2022814789, now seen corresponding path program 56 times [2021-06-05 13:44:00,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:00,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287764826] [2021-06-05 13:44:00,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:00,902 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 13:44:00,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:00,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287764826] [2021-06-05 13:44:00,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287764826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:00,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801059633] [2021-06-05 13:44:00,902 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 13:44:00,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:00,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:00,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:00,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:00,997 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 13:44:00,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801059633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:00,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:00,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:44:00,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310962445] [2021-06-05 13:44:00,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:44:00,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:00,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:44:00,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:44:00,997 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 13:44:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:01,353 INFO L93 Difference]: Finished difference Result 7550 states and 18942 transitions. [2021-06-05 13:44:01,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:44:01,354 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 13:44:01,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:01,360 INFO L225 Difference]: With dead ends: 7550 [2021-06-05 13:44:01,360 INFO L226 Difference]: Without dead ends: 7535 [2021-06-05 13:44:01,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:01,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7535 states. [2021-06-05 13:44:01,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7535 to 6598. [2021-06-05 13:44:01,426 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 13:44:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6598 states to 6598 states and 17133 transitions. [2021-06-05 13:44:01,435 INFO L78 Accepts]: Start accepts. Automaton has 6598 states and 17133 transitions. Word has length 47 [2021-06-05 13:44:01,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:01,436 INFO L482 AbstractCegarLoop]: Abstraction has 6598 states and 17133 transitions. [2021-06-05 13:44:01,436 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 13:44:01,436 INFO L276 IsEmpty]: Start isEmpty. Operand 6598 states and 17133 transitions. [2021-06-05 13:44:01,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:01,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:01,440 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 13:44:01,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:01,640 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:01,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:01,641 INFO L82 PathProgramCache]: Analyzing trace with hash -522481797, now seen corresponding path program 119 times [2021-06-05 13:44:01,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:01,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483002909] [2021-06-05 13:44:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:01,708 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 13:44:01,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:01,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483002909] [2021-06-05 13:44:01,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483002909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:01,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549758305] [2021-06-05 13:44:01,708 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 13:44:01,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 13:44:01,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:01,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:01,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:01,818 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 13:44:01,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549758305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:01,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:01,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:44:01,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149352927] [2021-06-05 13:44:01,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:44:01,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:01,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:44:01,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:44:01,819 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 13:44:02,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:02,245 INFO L93 Difference]: Finished difference Result 7269 states and 18302 transitions. [2021-06-05 13:44:02,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:44:02,245 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 13:44:02,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:02,253 INFO L225 Difference]: With dead ends: 7269 [2021-06-05 13:44:02,253 INFO L226 Difference]: Without dead ends: 7177 [2021-06-05 13:44:02,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:02,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7177 states. [2021-06-05 13:44:02,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7177 to 6587. [2021-06-05 13:44:02,334 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 13:44:02,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6587 states to 6587 states and 17051 transitions. [2021-06-05 13:44:02,345 INFO L78 Accepts]: Start accepts. Automaton has 6587 states and 17051 transitions. Word has length 47 [2021-06-05 13:44:02,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:02,345 INFO L482 AbstractCegarLoop]: Abstraction has 6587 states and 17051 transitions. [2021-06-05 13:44:02,345 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 13:44:02,345 INFO L276 IsEmpty]: Start isEmpty. Operand 6587 states and 17051 transitions. [2021-06-05 13:44:02,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:02,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:02,350 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 13:44:02,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 13:44:02,550 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:02,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:02,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1136017977, now seen corresponding path program 120 times [2021-06-05 13:44:02,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:02,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585129346] [2021-06-05 13:44:02,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:02,622 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 13:44:02,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:02,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585129346] [2021-06-05 13:44:02,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585129346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:02,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441872238] [2021-06-05 13:44:02,622 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 13:44:02,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 13:44:02,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:02,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:02,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:02,721 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 13:44:02,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441872238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:02,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:02,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:44:02,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095324273] [2021-06-05 13:44:02,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:44:02,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:02,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:44:02,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:44:02,722 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 13:44:03,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:03,050 INFO L93 Difference]: Finished difference Result 7638 states and 19101 transitions. [2021-06-05 13:44:03,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:44:03,050 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 13:44:03,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:03,057 INFO L225 Difference]: With dead ends: 7638 [2021-06-05 13:44:03,057 INFO L226 Difference]: Without dead ends: 7626 [2021-06-05 13:44:03,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:03,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7626 states. [2021-06-05 13:44:03,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7626 to 6635. [2021-06-05 13:44:03,141 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 13:44:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 17170 transitions. [2021-06-05 13:44:03,149 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 17170 transitions. Word has length 47 [2021-06-05 13:44:03,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:03,149 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 17170 transitions. [2021-06-05 13:44:03,149 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 13:44:03,149 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 17170 transitions. [2021-06-05 13:44:03,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:03,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:03,153 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 13:44:03,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 13:44:03,354 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:03,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:03,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1293317464, now seen corresponding path program 57 times [2021-06-05 13:44:03,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:03,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76796461] [2021-06-05 13:44:03,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:03,408 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 13:44:03,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:03,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76796461] [2021-06-05 13:44:03,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76796461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:03,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929089584] [2021-06-05 13:44:03,409 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 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 13:44:03,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 13:44:03,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:03,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:03,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:03,509 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 13:44:03,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929089584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:03,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:03,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 13:44:03,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374050744] [2021-06-05 13:44:03,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:44:03,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:03,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:44:03,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:44:03,510 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 13:44:03,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:03,703 INFO L93 Difference]: Finished difference Result 7955 states and 19893 transitions. [2021-06-05 13:44:03,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:44:03,703 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 13:44:03,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:03,711 INFO L225 Difference]: With dead ends: 7955 [2021-06-05 13:44:03,711 INFO L226 Difference]: Without dead ends: 7935 [2021-06-05 13:44:03,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:44:03,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7935 states. [2021-06-05 13:44:03,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7935 to 6729. [2021-06-05 13:44:03,786 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 13:44:03,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6729 states to 6729 states and 17365 transitions. [2021-06-05 13:44:03,796 INFO L78 Accepts]: Start accepts. Automaton has 6729 states and 17365 transitions. Word has length 47 [2021-06-05 13:44:03,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:03,796 INFO L482 AbstractCegarLoop]: Abstraction has 6729 states and 17365 transitions. [2021-06-05 13:44:03,796 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 13:44:03,796 INFO L276 IsEmpty]: Start isEmpty. Operand 6729 states and 17365 transitions. [2021-06-05 13:44:03,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:03,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:03,801 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 13:44:04,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-05 13:44:04,002 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:04,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:04,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1510591816, now seen corresponding path program 121 times [2021-06-05 13:44:04,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:04,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133032742] [2021-06-05 13:44:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:04,055 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 13:44:04,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:04,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133032742] [2021-06-05 13:44:04,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133032742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:04,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315735949] [2021-06-05 13:44:04,056 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 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 13:44:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:04,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:04,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:04,150 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 13:44:04,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315735949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:04,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:04,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:44:04,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112946501] [2021-06-05 13:44:04,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:44:04,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:04,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:44:04,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:44:04,151 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 13:44:04,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:04,296 INFO L93 Difference]: Finished difference Result 8206 states and 20010 transitions. [2021-06-05 13:44:04,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:44:04,297 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 13:44:04,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:04,305 INFO L225 Difference]: With dead ends: 8206 [2021-06-05 13:44:04,306 INFO L226 Difference]: Without dead ends: 8188 [2021-06-05 13:44:04,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:04,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8188 states. [2021-06-05 13:44:04,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8188 to 6724. [2021-06-05 13:44:04,387 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 13:44:04,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 17339 transitions. [2021-06-05 13:44:04,397 INFO L78 Accepts]: Start accepts. Automaton has 6724 states and 17339 transitions. Word has length 47 [2021-06-05 13:44:04,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:04,397 INFO L482 AbstractCegarLoop]: Abstraction has 6724 states and 17339 transitions. [2021-06-05 13:44:04,397 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 13:44:04,397 INFO L276 IsEmpty]: Start isEmpty. Operand 6724 states and 17339 transitions. [2021-06-05 13:44:04,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:04,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:04,402 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 13:44:04,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-05 13:44:04,605 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:04,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:04,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1005899357, now seen corresponding path program 122 times [2021-06-05 13:44:04,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:04,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607889980] [2021-06-05 13:44:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:04,680 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 13:44:04,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:04,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607889980] [2021-06-05 13:44:04,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607889980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:04,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730274138] [2021-06-05 13:44:04,680 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 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 13:44:04,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:04,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:04,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:04,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:04,776 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 13:44:04,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730274138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:04,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:04,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:44:04,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836138785] [2021-06-05 13:44:04,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:44:04,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:04,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:44:04,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:44:04,777 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 13:44:05,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:05,274 INFO L93 Difference]: Finished difference Result 8839 states and 21652 transitions. [2021-06-05 13:44:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:44:05,275 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 13:44:05,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:05,286 INFO L225 Difference]: With dead ends: 8839 [2021-06-05 13:44:05,286 INFO L226 Difference]: Without dead ends: 8785 [2021-06-05 13:44:05,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:44:05,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8785 states. [2021-06-05 13:44:05,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8785 to 6842. [2021-06-05 13:44:05,382 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 13:44:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6842 states to 6842 states and 17646 transitions. [2021-06-05 13:44:05,394 INFO L78 Accepts]: Start accepts. Automaton has 6842 states and 17646 transitions. Word has length 47 [2021-06-05 13:44:05,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:05,394 INFO L482 AbstractCegarLoop]: Abstraction has 6842 states and 17646 transitions. [2021-06-05 13:44:05,394 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 13:44:05,394 INFO L276 IsEmpty]: Start isEmpty. Operand 6842 states and 17646 transitions. [2021-06-05 13:44:05,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:05,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:05,400 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 13:44:05,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:05,600 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:05,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:05,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1756508830, now seen corresponding path program 123 times [2021-06-05 13:44:05,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:05,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310393934] [2021-06-05 13:44:05,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:05,664 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 13:44:05,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:05,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310393934] [2021-06-05 13:44:05,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310393934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:05,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925547297] [2021-06-05 13:44:05,665 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 13:44:05,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 13:44:05,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:05,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:05,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:05,765 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 13:44:05,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925547297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:05,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:05,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 13:44:05,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22527704] [2021-06-05 13:44:05,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:44:05,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:05,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:44:05,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:44:05,766 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 13:44:05,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:05,918 INFO L93 Difference]: Finished difference Result 8382 states and 20407 transitions. [2021-06-05 13:44:05,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:44:05,919 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 13:44:05,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:05,928 INFO L225 Difference]: With dead ends: 8382 [2021-06-05 13:44:05,928 INFO L226 Difference]: Without dead ends: 8358 [2021-06-05 13:44:05,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:44:05,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8358 states. [2021-06-05 13:44:05,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8358 to 6842. [2021-06-05 13:44:06,001 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 13:44:06,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6842 states to 6842 states and 17635 transitions. [2021-06-05 13:44:06,060 INFO L78 Accepts]: Start accepts. Automaton has 6842 states and 17635 transitions. Word has length 47 [2021-06-05 13:44:06,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:06,060 INFO L482 AbstractCegarLoop]: Abstraction has 6842 states and 17635 transitions. [2021-06-05 13:44:06,060 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 13:44:06,060 INFO L276 IsEmpty]: Start isEmpty. Operand 6842 states and 17635 transitions. [2021-06-05 13:44:06,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:06,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:06,065 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 13:44:06,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable450 [2021-06-05 13:44:06,265 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:06,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:06,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1160735891, now seen corresponding path program 124 times [2021-06-05 13:44:06,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:06,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236909050] [2021-06-05 13:44:06,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:06,344 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 13:44:06,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:06,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236909050] [2021-06-05 13:44:06,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236909050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:06,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27490599] [2021-06-05 13:44:06,345 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 13:44:06,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:06,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:06,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:06,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:06,441 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 13:44:06,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27490599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:06,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:06,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:44:06,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391003426] [2021-06-05 13:44:06,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:06,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:06,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:06,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:06,442 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 13:44:07,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:07,227 INFO L93 Difference]: Finished difference Result 11528 states and 27416 transitions. [2021-06-05 13:44:07,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 13:44:07,228 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 13:44:07,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:07,240 INFO L225 Difference]: With dead ends: 11528 [2021-06-05 13:44:07,240 INFO L226 Difference]: Without dead ends: 11348 [2021-06-05 13:44:07,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 357.7ms TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:44:07,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11348 states. [2021-06-05 13:44:07,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11348 to 7099. [2021-06-05 13:44:07,336 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 13:44:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 18268 transitions. [2021-06-05 13:44:07,346 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 18268 transitions. Word has length 47 [2021-06-05 13:44:07,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:07,346 INFO L482 AbstractCegarLoop]: Abstraction has 7099 states and 18268 transitions. [2021-06-05 13:44:07,346 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 13:44:07,346 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 18268 transitions. [2021-06-05 13:44:07,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:07,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:07,351 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 13:44:07,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 13:44:07,552 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:07,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:07,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1547338568, now seen corresponding path program 125 times [2021-06-05 13:44:07,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:07,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573146456] [2021-06-05 13:44:07,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:07,633 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 13:44:07,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:07,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573146456] [2021-06-05 13:44:07,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573146456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:07,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117659667] [2021-06-05 13:44:07,633 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 13:44:07,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 13:44:07,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:07,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:07,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:07,754 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 13:44:07,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117659667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:07,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:07,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-06-05 13:44:07,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696890234] [2021-06-05 13:44:07,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:44:07,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:07,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:44:07,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:07,755 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 13:44:08,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:08,005 INFO L93 Difference]: Finished difference Result 8869 states and 21483 transitions. [2021-06-05 13:44:08,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:44:08,005 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 13:44:08,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:08,014 INFO L225 Difference]: With dead ends: 8869 [2021-06-05 13:44:08,014 INFO L226 Difference]: Without dead ends: 8836 [2021-06-05 13:44:08,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:08,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2021-06-05 13:44:08,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 7099. [2021-06-05 13:44:08,088 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 13:44:08,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 18265 transitions. [2021-06-05 13:44:08,098 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 18265 transitions. Word has length 47 [2021-06-05 13:44:08,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:08,098 INFO L482 AbstractCegarLoop]: Abstraction has 7099 states and 18265 transitions. [2021-06-05 13:44:08,098 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 13:44:08,098 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 18265 transitions. [2021-06-05 13:44:08,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:08,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:08,102 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 13:44:08,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-05 13:44:08,303 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:08,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:08,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1101044381, now seen corresponding path program 126 times [2021-06-05 13:44:08,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:08,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92238606] [2021-06-05 13:44:08,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:08,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:08,391 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 13:44:08,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:08,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92238606] [2021-06-05 13:44:08,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92238606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:08,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082443438] [2021-06-05 13:44:08,392 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 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 13:44:08,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 13:44:08,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:08,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:08,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:08,491 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 13:44:08,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082443438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:08,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:08,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:44:08,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282095212] [2021-06-05 13:44:08,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:44:08,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:08,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:44:08,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:08,492 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 13:44:09,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:09,599 INFO L93 Difference]: Finished difference Result 13900 states and 32512 transitions. [2021-06-05 13:44:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 13:44:09,600 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 13:44:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:09,612 INFO L225 Difference]: With dead ends: 13900 [2021-06-05 13:44:09,612 INFO L226 Difference]: Without dead ends: 13624 [2021-06-05 13:44:09,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 649.7ms TimeCoverageRelationStatistics Valid=489, Invalid=3671, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 13:44:09,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13624 states. [2021-06-05 13:44:09,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13624 to 7315. [2021-06-05 13:44:09,711 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 13:44:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 18787 transitions. [2021-06-05 13:44:09,721 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 18787 transitions. Word has length 47 [2021-06-05 13:44:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:09,721 INFO L482 AbstractCegarLoop]: Abstraction has 7315 states and 18787 transitions. [2021-06-05 13:44:09,721 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 13:44:09,721 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 18787 transitions. [2021-06-05 13:44:09,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:09,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:09,726 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 13:44:09,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:09,927 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:09,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:09,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1300350046, now seen corresponding path program 127 times [2021-06-05 13:44:09,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:09,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79292947] [2021-06-05 13:44:09,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:10,007 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 13:44:10,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:10,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79292947] [2021-06-05 13:44:10,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79292947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:10,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159468177] [2021-06-05 13:44:10,008 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 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 13:44:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:10,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:10,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:10,106 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 13:44:10,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159468177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:10,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:10,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:44:10,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625913979] [2021-06-05 13:44:10,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:44:10,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:10,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:44:10,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:10,107 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 13:44:10,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:10,324 INFO L93 Difference]: Finished difference Result 9027 states and 21871 transitions. [2021-06-05 13:44:10,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:44:10,324 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 13:44:10,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:10,333 INFO L225 Difference]: With dead ends: 9027 [2021-06-05 13:44:10,333 INFO L226 Difference]: Without dead ends: 8985 [2021-06-05 13:44:10,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:44:10,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8985 states. [2021-06-05 13:44:10,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8985 to 7097. [2021-06-05 13:44:10,411 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 13:44:10,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7097 states to 7097 states and 18161 transitions. [2021-06-05 13:44:10,421 INFO L78 Accepts]: Start accepts. Automaton has 7097 states and 18161 transitions. Word has length 47 [2021-06-05 13:44:10,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:10,421 INFO L482 AbstractCegarLoop]: Abstraction has 7097 states and 18161 transitions. [2021-06-05 13:44:10,421 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 13:44:10,421 INFO L276 IsEmpty]: Start isEmpty. Operand 7097 states and 18161 transitions. [2021-06-05 13:44:10,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:10,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:10,426 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 13:44:10,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:10,629 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:10,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:10,629 INFO L82 PathProgramCache]: Analyzing trace with hash 947730515, now seen corresponding path program 128 times [2021-06-05 13:44:10,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:10,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797473912] [2021-06-05 13:44:10,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:10,727 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 13:44:10,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:10,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797473912] [2021-06-05 13:44:10,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797473912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:10,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851269400] [2021-06-05 13:44:10,728 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 13:44:10,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:10,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:10,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:10,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:10,823 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 13:44:10,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851269400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:10,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:10,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:44:10,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990122004] [2021-06-05 13:44:10,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:44:10,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:10,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:44:10,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:44:10,824 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 13:44:11,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:11,362 INFO L93 Difference]: Finished difference Result 9058 states and 21780 transitions. [2021-06-05 13:44:11,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:44:11,362 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 13:44:11,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:11,370 INFO L225 Difference]: With dead ends: 9058 [2021-06-05 13:44:11,370 INFO L226 Difference]: Without dead ends: 8680 [2021-06-05 13:44:11,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 250.1ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:44:11,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8680 states. [2021-06-05 13:44:11,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8680 to 6394. [2021-06-05 13:44:11,444 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 13:44:11,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6394 states to 6394 states and 16393 transitions. [2021-06-05 13:44:11,452 INFO L78 Accepts]: Start accepts. Automaton has 6394 states and 16393 transitions. Word has length 47 [2021-06-05 13:44:11,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:11,452 INFO L482 AbstractCegarLoop]: Abstraction has 6394 states and 16393 transitions. [2021-06-05 13:44:11,452 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 13:44:11,452 INFO L276 IsEmpty]: Start isEmpty. Operand 6394 states and 16393 transitions. [2021-06-05 13:44:11,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:11,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:11,456 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 13:44:11,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:11,657 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:11,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:11,657 INFO L82 PathProgramCache]: Analyzing trace with hash 87788588, now seen corresponding path program 58 times [2021-06-05 13:44:11,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:11,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190773274] [2021-06-05 13:44:11,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:11,712 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 13:44:11,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:11,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190773274] [2021-06-05 13:44:11,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190773274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:11,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119989806] [2021-06-05 13:44:11,713 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 13:44:11,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:11,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:11,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:11,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:11,813 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 13:44:11,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119989806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:11,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:11,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 13:44:11,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623088902] [2021-06-05 13:44:11,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:44:11,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:11,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:44:11,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:44:11,814 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 13:44:12,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:12,015 INFO L93 Difference]: Finished difference Result 9182 states and 22469 transitions. [2021-06-05 13:44:12,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:44:12,015 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 13:44:12,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:12,026 INFO L225 Difference]: With dead ends: 9182 [2021-06-05 13:44:12,027 INFO L226 Difference]: Without dead ends: 9182 [2021-06-05 13:44:12,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:44:12,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9182 states. [2021-06-05 13:44:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9182 to 6584. [2021-06-05 13:44:12,104 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 13:44:12,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6584 states to 6584 states and 16967 transitions. [2021-06-05 13:44:12,113 INFO L78 Accepts]: Start accepts. Automaton has 6584 states and 16967 transitions. Word has length 47 [2021-06-05 13:44:12,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:12,113 INFO L482 AbstractCegarLoop]: Abstraction has 6584 states and 16967 transitions. [2021-06-05 13:44:12,113 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 13:44:12,113 INFO L276 IsEmpty]: Start isEmpty. Operand 6584 states and 16967 transitions. [2021-06-05 13:44:12,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:12,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:12,117 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 13:44:12,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-05 13:44:12,317 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:12,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:12,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1549783868, now seen corresponding path program 59 times [2021-06-05 13:44:12,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:12,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171924023] [2021-06-05 13:44:12,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:12,413 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 13:44:12,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:12,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171924023] [2021-06-05 13:44:12,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171924023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:12,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130100326] [2021-06-05 13:44:12,414 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 13:44:12,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 13:44:12,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:12,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:12,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:12,639 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 13:44:12,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130100326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:12,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:12,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 24 [2021-06-05 13:44:12,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541216070] [2021-06-05 13:44:12,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:44:12,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:12,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:44:12,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:44:12,640 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 13:44:13,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:13,302 INFO L93 Difference]: Finished difference Result 10546 states and 25434 transitions. [2021-06-05 13:44:13,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 13:44:13,302 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 13:44:13,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:13,312 INFO L225 Difference]: With dead ends: 10546 [2021-06-05 13:44:13,313 INFO L226 Difference]: Without dead ends: 10546 [2021-06-05 13:44:13,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 466.5ms TimeCoverageRelationStatistics Valid=568, Invalid=1154, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 13:44:13,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10546 states. [2021-06-05 13:44:13,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10546 to 6608. [2021-06-05 13:44:13,392 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 13:44:13,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6608 states to 6608 states and 17036 transitions. [2021-06-05 13:44:13,400 INFO L78 Accepts]: Start accepts. Automaton has 6608 states and 17036 transitions. Word has length 47 [2021-06-05 13:44:13,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:13,401 INFO L482 AbstractCegarLoop]: Abstraction has 6608 states and 17036 transitions. [2021-06-05 13:44:13,401 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 13:44:13,401 INFO L276 IsEmpty]: Start isEmpty. Operand 6608 states and 17036 transitions. [2021-06-05 13:44:13,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:13,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:13,405 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 13:44:13,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:13,605 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:13,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:13,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1055188264, now seen corresponding path program 60 times [2021-06-05 13:44:13,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:13,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511767073] [2021-06-05 13:44:13,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:13,682 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 13:44:13,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:13,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511767073] [2021-06-05 13:44:13,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511767073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:13,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127193426] [2021-06-05 13:44:13,682 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 13:44:13,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 13:44:13,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:13,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:13,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:13,787 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 13:44:13,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127193426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:13,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:13,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 13:44:13,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095301372] [2021-06-05 13:44:13,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:44:13,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:13,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:44:13,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:13,788 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 13:44:14,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:14,116 INFO L93 Difference]: Finished difference Result 9881 states and 24078 transitions. [2021-06-05 13:44:14,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:44:14,117 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 13:44:14,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:14,126 INFO L225 Difference]: With dead ends: 9881 [2021-06-05 13:44:14,126 INFO L226 Difference]: Without dead ends: 9881 [2021-06-05 13:44:14,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=213, Invalid=339, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:44:14,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9881 states. [2021-06-05 13:44:14,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9881 to 6643. [2021-06-05 13:44:14,199 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 13:44:14,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6643 states to 6643 states and 17138 transitions. [2021-06-05 13:44:14,207 INFO L78 Accepts]: Start accepts. Automaton has 6643 states and 17138 transitions. Word has length 47 [2021-06-05 13:44:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:14,207 INFO L482 AbstractCegarLoop]: Abstraction has 6643 states and 17138 transitions. [2021-06-05 13:44:14,207 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 13:44:14,207 INFO L276 IsEmpty]: Start isEmpty. Operand 6643 states and 17138 transitions. [2021-06-05 13:44:14,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:14,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:14,211 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 13:44:14,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:14,411 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:14,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:14,412 INFO L82 PathProgramCache]: Analyzing trace with hash 15901252, now seen corresponding path program 61 times [2021-06-05 13:44:14,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:14,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850098348] [2021-06-05 13:44:14,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:14,495 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 13:44:14,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:14,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850098348] [2021-06-05 13:44:14,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850098348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:14,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263352274] [2021-06-05 13:44:14,496 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 13:44:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:14,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:14,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:14,613 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 13:44:14,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263352274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:14,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:14,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:44:14,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726363278] [2021-06-05 13:44:14,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:44:14,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:14,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:44:14,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:44:14,614 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 13:44:14,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:14,959 INFO L93 Difference]: Finished difference Result 9085 states and 22271 transitions. [2021-06-05 13:44:14,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:44:14,959 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 13:44:14,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:14,969 INFO L225 Difference]: With dead ends: 9085 [2021-06-05 13:44:14,969 INFO L226 Difference]: Without dead ends: 9085 [2021-06-05 13:44:14,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=227, Invalid=373, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:44:14,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9085 states. [2021-06-05 13:44:15,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9085 to 6641. [2021-06-05 13:44:15,046 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 13:44:15,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6641 states to 6641 states and 17133 transitions. [2021-06-05 13:44:15,055 INFO L78 Accepts]: Start accepts. Automaton has 6641 states and 17133 transitions. Word has length 47 [2021-06-05 13:44:15,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:15,055 INFO L482 AbstractCegarLoop]: Abstraction has 6641 states and 17133 transitions. [2021-06-05 13:44:15,055 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 13:44:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 6641 states and 17133 transitions. [2021-06-05 13:44:15,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:15,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:15,059 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 13:44:15,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:15,260 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:15,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:15,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1035763624, now seen corresponding path program 62 times [2021-06-05 13:44:15,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:15,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391084293] [2021-06-05 13:44:15,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:15,356 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 13:44:15,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:15,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391084293] [2021-06-05 13:44:15,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391084293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:15,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489610821] [2021-06-05 13:44:15,356 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 13:44:15,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:15,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:15,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:15,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:15,490 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 13:44:15,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489610821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:15,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:15,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 13:44:15,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753883663] [2021-06-05 13:44:15,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:44:15,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:15,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:44:15,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:15,492 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 13:44:15,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:15,866 INFO L93 Difference]: Finished difference Result 7979 states and 19784 transitions. [2021-06-05 13:44:15,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:44:15,866 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 13:44:15,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:15,874 INFO L225 Difference]: With dead ends: 7979 [2021-06-05 13:44:15,874 INFO L226 Difference]: Without dead ends: 7979 [2021-06-05 13:44:15,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 184.4ms TimeCoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:44:15,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7979 states. [2021-06-05 13:44:15,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7979 to 6178. [2021-06-05 13:44:15,945 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 13:44:15,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6178 states to 6178 states and 15943 transitions. [2021-06-05 13:44:15,954 INFO L78 Accepts]: Start accepts. Automaton has 6178 states and 15943 transitions. Word has length 47 [2021-06-05 13:44:15,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:15,954 INFO L482 AbstractCegarLoop]: Abstraction has 6178 states and 15943 transitions. [2021-06-05 13:44:15,954 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 13:44:15,954 INFO L276 IsEmpty]: Start isEmpty. Operand 6178 states and 15943 transitions. [2021-06-05 13:44:15,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:15,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:15,958 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 13:44:16,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:16,159 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:16,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:16,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1697148168, now seen corresponding path program 129 times [2021-06-05 13:44:16,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:16,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705195574] [2021-06-05 13:44:16,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:16,252 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 13:44:16,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:16,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705195574] [2021-06-05 13:44:16,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705195574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:16,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978563515] [2021-06-05 13:44:16,253 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 13:44:16,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:44:16,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:16,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:16,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:16,354 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 13:44:16,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978563515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:16,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:16,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 13:44:16,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38338231] [2021-06-05 13:44:16,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:44:16,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:16,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:44:16,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:44:16,355 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 13:44:16,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:16,571 INFO L93 Difference]: Finished difference Result 7415 states and 18154 transitions. [2021-06-05 13:44:16,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:44:16,571 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 13:44:16,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:16,578 INFO L225 Difference]: With dead ends: 7415 [2021-06-05 13:44:16,578 INFO L226 Difference]: Without dead ends: 7370 [2021-06-05 13:44:16,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:44:16,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7370 states. [2021-06-05 13:44:16,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7370 to 6187. [2021-06-05 13:44:16,649 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 13:44:16,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6187 states to 6187 states and 15958 transitions. [2021-06-05 13:44:16,658 INFO L78 Accepts]: Start accepts. Automaton has 6187 states and 15958 transitions. Word has length 47 [2021-06-05 13:44:16,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:16,658 INFO L482 AbstractCegarLoop]: Abstraction has 6187 states and 15958 transitions. [2021-06-05 13:44:16,658 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 13:44:16,658 INFO L276 IsEmpty]: Start isEmpty. Operand 6187 states and 15958 transitions. [2021-06-05 13:44:16,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:16,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:16,662 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 13:44:16,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:16,865 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:16,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:16,865 INFO L82 PathProgramCache]: Analyzing trace with hash -686375646, now seen corresponding path program 130 times [2021-06-05 13:44:16,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:16,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174768664] [2021-06-05 13:44:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:16,961 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 13:44:16,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:16,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174768664] [2021-06-05 13:44:16,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174768664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:16,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828537631] [2021-06-05 13:44:16,962 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 13:44:16,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:16,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:16,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:16,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:17,065 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 13:44:17,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828537631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:17,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:17,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 13:44:17,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632971495] [2021-06-05 13:44:17,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:44:17,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:17,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:44:17,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:44:17,066 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 13:44:17,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:17,422 INFO L93 Difference]: Finished difference Result 7945 states and 19639 transitions. [2021-06-05 13:44:17,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:44:17,423 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 13:44:17,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:17,430 INFO L225 Difference]: With dead ends: 7945 [2021-06-05 13:44:17,431 INFO L226 Difference]: Without dead ends: 7945 [2021-06-05 13:44:17,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:44:17,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2021-06-05 13:44:17,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 6576. [2021-06-05 13:44:17,506 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 13:44:17,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6576 states to 6576 states and 17142 transitions. [2021-06-05 13:44:17,516 INFO L78 Accepts]: Start accepts. Automaton has 6576 states and 17142 transitions. Word has length 47 [2021-06-05 13:44:17,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:17,516 INFO L482 AbstractCegarLoop]: Abstraction has 6576 states and 17142 transitions. [2021-06-05 13:44:17,516 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 13:44:17,517 INFO L276 IsEmpty]: Start isEmpty. Operand 6576 states and 17142 transitions. [2021-06-05 13:44:17,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:17,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:17,521 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 13:44:17,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2021-06-05 13:44:17,722 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:17,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:17,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1627893973, now seen corresponding path program 63 times [2021-06-05 13:44:17,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:17,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628629391] [2021-06-05 13:44:17,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:17,823 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 13:44:17,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:17,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628629391] [2021-06-05 13:44:17,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628629391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:17,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114590006] [2021-06-05 13:44:17,823 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 13:44:17,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 13:44:17,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:17,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:17,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:17,927 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 13:44:17,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114590006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:17,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:17,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:44:17,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527884316] [2021-06-05 13:44:17,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:44:17,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:17,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:44:17,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:44:17,928 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 13:44:18,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:18,405 INFO L93 Difference]: Finished difference Result 9298 states and 22741 transitions. [2021-06-05 13:44:18,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:44:18,405 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 13:44:18,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:18,414 INFO L225 Difference]: With dead ends: 9298 [2021-06-05 13:44:18,414 INFO L226 Difference]: Without dead ends: 9166 [2021-06-05 13:44:18,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:44:18,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9166 states. [2021-06-05 13:44:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9166 to 6568. [2021-06-05 13:44:18,515 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 13:44:18,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6568 states to 6568 states and 17125 transitions. [2021-06-05 13:44:18,525 INFO L78 Accepts]: Start accepts. Automaton has 6568 states and 17125 transitions. Word has length 47 [2021-06-05 13:44:18,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:18,525 INFO L482 AbstractCegarLoop]: Abstraction has 6568 states and 17125 transitions. [2021-06-05 13:44:18,525 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 13:44:18,525 INFO L276 IsEmpty]: Start isEmpty. Operand 6568 states and 17125 transitions. [2021-06-05 13:44:18,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:18,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:18,530 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 13:44:18,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:18,731 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:18,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:18,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1148331157, now seen corresponding path program 131 times [2021-06-05 13:44:18,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:18,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529943174] [2021-06-05 13:44:18,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:18,843 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 13:44:18,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:18,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529943174] [2021-06-05 13:44:18,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529943174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:18,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682886263] [2021-06-05 13:44:18,844 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 13:44:18,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 13:44:18,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:18,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:18,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:19,065 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 13:44:19,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682886263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:19,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:19,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 13:44:19,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592851105] [2021-06-05 13:44:19,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:44:19,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:19,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:44:19,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:44:19,065 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 13:44:19,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:19,629 INFO L93 Difference]: Finished difference Result 6738 states and 17392 transitions. [2021-06-05 13:44:19,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:44:19,629 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 13:44:19,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:19,637 INFO L225 Difference]: With dead ends: 6738 [2021-06-05 13:44:19,637 INFO L226 Difference]: Without dead ends: 6682 [2021-06-05 13:44:19,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:19,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6682 states. [2021-06-05 13:44:19,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6682 to 6568. [2021-06-05 13:44:19,708 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 13:44:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6568 states to 6568 states and 17104 transitions. [2021-06-05 13:44:19,719 INFO L78 Accepts]: Start accepts. Automaton has 6568 states and 17104 transitions. Word has length 47 [2021-06-05 13:44:19,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:19,719 INFO L482 AbstractCegarLoop]: Abstraction has 6568 states and 17104 transitions. [2021-06-05 13:44:19,719 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 13:44:19,719 INFO L276 IsEmpty]: Start isEmpty. Operand 6568 states and 17104 transitions. [2021-06-05 13:44:19,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:19,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:19,723 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 13:44:19,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable482 [2021-06-05 13:44:19,924 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:19,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:19,924 INFO L82 PathProgramCache]: Analyzing trace with hash -759601188, now seen corresponding path program 64 times [2021-06-05 13:44:19,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:19,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508655123] [2021-06-05 13:44:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:20,016 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 13:44:20,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:20,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508655123] [2021-06-05 13:44:20,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508655123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:20,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900376273] [2021-06-05 13:44:20,017 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 13:44:20,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:20,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:20,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:20,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:20,118 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 13:44:20,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900376273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:20,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:20,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:44:20,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450047346] [2021-06-05 13:44:20,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:44:20,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:20,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:44:20,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:44:20,119 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 13:44:20,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:20,347 INFO L93 Difference]: Finished difference Result 8053 states and 20088 transitions. [2021-06-05 13:44:20,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:44:20,347 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 13:44:20,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:20,354 INFO L225 Difference]: With dead ends: 8053 [2021-06-05 13:44:20,355 INFO L226 Difference]: Without dead ends: 7951 [2021-06-05 13:44:20,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:20,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-06-05 13:44:20,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 6416. [2021-06-05 13:44:20,425 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 13:44:20,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6416 states to 6416 states and 16733 transitions. [2021-06-05 13:44:20,434 INFO L78 Accepts]: Start accepts. Automaton has 6416 states and 16733 transitions. Word has length 47 [2021-06-05 13:44:20,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:20,434 INFO L482 AbstractCegarLoop]: Abstraction has 6416 states and 16733 transitions. [2021-06-05 13:44:20,434 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 13:44:20,434 INFO L276 IsEmpty]: Start isEmpty. Operand 6416 states and 16733 transitions. [2021-06-05 13:44:20,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:20,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:20,438 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 13:44:20,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:20,639 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:20,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:20,639 INFO L82 PathProgramCache]: Analyzing trace with hash 372425610, now seen corresponding path program 132 times [2021-06-05 13:44:20,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:20,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231297409] [2021-06-05 13:44:20,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:20,728 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 13:44:20,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:20,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231297409] [2021-06-05 13:44:20,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231297409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:20,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64525497] [2021-06-05 13:44:20,728 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 13:44:20,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 13:44:20,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:20,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:20,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:20,878 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 13:44:20,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64525497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:20,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:20,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 13:44:20,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322317349] [2021-06-05 13:44:20,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:20,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:20,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:20,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:20,879 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 13:44:21,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:21,191 INFO L93 Difference]: Finished difference Result 8176 states and 20353 transitions. [2021-06-05 13:44:21,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:44:21,191 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 13:44:21,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:21,199 INFO L225 Difference]: With dead ends: 8176 [2021-06-05 13:44:21,199 INFO L226 Difference]: Without dead ends: 8176 [2021-06-05 13:44:21,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 192.1ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:44:21,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-06-05 13:44:21,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 6714. [2021-06-05 13:44:21,279 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 13:44:21,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6714 states to 6714 states and 17639 transitions. [2021-06-05 13:44:21,289 INFO L78 Accepts]: Start accepts. Automaton has 6714 states and 17639 transitions. Word has length 47 [2021-06-05 13:44:21,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:21,289 INFO L482 AbstractCegarLoop]: Abstraction has 6714 states and 17639 transitions. [2021-06-05 13:44:21,289 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 13:44:21,289 INFO L276 IsEmpty]: Start isEmpty. Operand 6714 states and 17639 transitions. [2021-06-05 13:44:21,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:21,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:21,294 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 13:44:21,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 13:44:21,496 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:21,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:21,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1064796407, now seen corresponding path program 65 times [2021-06-05 13:44:21,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:21,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833733695] [2021-06-05 13:44:21,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:21,589 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 13:44:21,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:21,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833733695] [2021-06-05 13:44:21,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833733695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:21,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814662743] [2021-06-05 13:44:21,590 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 13:44:21,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 13:44:21,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:21,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:21,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:21,691 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 13:44:21,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814662743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:21,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:21,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:44:21,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168092919] [2021-06-05 13:44:21,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:44:21,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:21,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:44:21,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:21,692 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 13:44:22,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:22,172 INFO L93 Difference]: Finished difference Result 8947 states and 22376 transitions. [2021-06-05 13:44:22,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:44:22,173 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 13:44:22,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:22,183 INFO L225 Difference]: With dead ends: 8947 [2021-06-05 13:44:22,183 INFO L226 Difference]: Without dead ends: 8933 [2021-06-05 13:44:22,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:44:22,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8933 states. [2021-06-05 13:44:22,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8933 to 6712. [2021-06-05 13:44:22,260 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 13:44:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6712 states to 6712 states and 17674 transitions. [2021-06-05 13:44:22,269 INFO L78 Accepts]: Start accepts. Automaton has 6712 states and 17674 transitions. Word has length 47 [2021-06-05 13:44:22,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:22,270 INFO L482 AbstractCegarLoop]: Abstraction has 6712 states and 17674 transitions. [2021-06-05 13:44:22,270 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 13:44:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand 6712 states and 17674 transitions. [2021-06-05 13:44:22,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:22,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:22,274 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 13:44:22,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:22,477 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:22,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:22,477 INFO L82 PathProgramCache]: Analyzing trace with hash 902744311, now seen corresponding path program 133 times [2021-06-05 13:44:22,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:22,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733831037] [2021-06-05 13:44:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:22,577 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 13:44:22,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:22,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733831037] [2021-06-05 13:44:22,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733831037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:22,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987885506] [2021-06-05 13:44:22,577 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 13:44:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:22,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:22,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:22,759 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 13:44:22,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987885506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:22,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:22,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 13:44:22,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064198987] [2021-06-05 13:44:22,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:44:22,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:22,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:44:22,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:44:22,760 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 13:44:23,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:23,246 INFO L93 Difference]: Finished difference Result 6816 states and 17833 transitions. [2021-06-05 13:44:23,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:44:23,247 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 13:44:23,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:23,253 INFO L225 Difference]: With dead ends: 6816 [2021-06-05 13:44:23,253 INFO L226 Difference]: Without dead ends: 6772 [2021-06-05 13:44:23,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:23,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6772 states. [2021-06-05 13:44:23,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6772 to 6712. [2021-06-05 13:44:23,317 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 13:44:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6712 states to 6712 states and 17665 transitions. [2021-06-05 13:44:23,327 INFO L78 Accepts]: Start accepts. Automaton has 6712 states and 17665 transitions. Word has length 47 [2021-06-05 13:44:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:23,327 INFO L482 AbstractCegarLoop]: Abstraction has 6712 states and 17665 transitions. [2021-06-05 13:44:23,327 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 13:44:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 6712 states and 17665 transitions. [2021-06-05 13:44:23,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:23,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:23,331 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 13:44:23,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:23,532 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:23,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:23,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1077953366, now seen corresponding path program 66 times [2021-06-05 13:44:23,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:23,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944253983] [2021-06-05 13:44:23,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:23,613 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 13:44:23,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:23,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944253983] [2021-06-05 13:44:23,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944253983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:23,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98755453] [2021-06-05 13:44:23,613 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 13:44:23,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:44:23,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:23,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:23,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:23,733 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 13:44:23,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98755453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:23,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:23,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-06-05 13:44:23,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57122960] [2021-06-05 13:44:23,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:44:23,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:23,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:44:23,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:44:23,734 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 13:44:24,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:24,001 INFO L93 Difference]: Finished difference Result 7827 states and 19871 transitions. [2021-06-05 13:44:24,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:44:24,002 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 13:44:24,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:24,010 INFO L225 Difference]: With dead ends: 7827 [2021-06-05 13:44:24,010 INFO L226 Difference]: Without dead ends: 7773 [2021-06-05 13:44:24,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:44:24,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7773 states. [2021-06-05 13:44:24,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7773 to 6518. [2021-06-05 13:44:24,085 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 13:44:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6518 states to 6518 states and 17157 transitions. [2021-06-05 13:44:24,095 INFO L78 Accepts]: Start accepts. Automaton has 6518 states and 17157 transitions. Word has length 47 [2021-06-05 13:44:24,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:24,095 INFO L482 AbstractCegarLoop]: Abstraction has 6518 states and 17157 transitions. [2021-06-05 13:44:24,095 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 13:44:24,095 INFO L276 IsEmpty]: Start isEmpty. Operand 6518 states and 17157 transitions. [2021-06-05 13:44:24,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:24,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:24,099 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 13:44:24,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:24,300 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:24,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:24,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1517458978, now seen corresponding path program 134 times [2021-06-05 13:44:24,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:24,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093017541] [2021-06-05 13:44:24,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:24,372 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 13:44:24,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:24,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093017541] [2021-06-05 13:44:24,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093017541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:24,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769913809] [2021-06-05 13:44:24,372 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 13:44:24,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:24,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:24,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:24,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:24,473 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 13:44:24,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769913809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:24,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:24,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:44:24,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665689310] [2021-06-05 13:44:24,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:24,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:24,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:24,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:24,474 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 13:44:24,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:24,701 INFO L93 Difference]: Finished difference Result 8402 states and 21039 transitions. [2021-06-05 13:44:24,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:44:24,702 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 13:44:24,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:24,710 INFO L225 Difference]: With dead ends: 8402 [2021-06-05 13:44:24,710 INFO L226 Difference]: Without dead ends: 8402 [2021-06-05 13:44:24,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:24,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8402 states. [2021-06-05 13:44:24,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8402 to 6836. [2021-06-05 13:44:24,808 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 13:44:24,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 18121 transitions. [2021-06-05 13:44:24,818 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 18121 transitions. Word has length 47 [2021-06-05 13:44:24,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:24,818 INFO L482 AbstractCegarLoop]: Abstraction has 6836 states and 18121 transitions. [2021-06-05 13:44:24,818 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 13:44:24,818 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 18121 transitions. [2021-06-05 13:44:24,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:24,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:24,822 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 13:44:25,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:25,023 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:25,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:25,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1223920619, now seen corresponding path program 67 times [2021-06-05 13:44:25,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:25,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452854126] [2021-06-05 13:44:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:25,102 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 13:44:25,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:25,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452854126] [2021-06-05 13:44:25,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452854126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:25,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035899926] [2021-06-05 13:44:25,103 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 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 13:44:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:25,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:25,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:25,199 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 13:44:25,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035899926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:25,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:25,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:44:25,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236768577] [2021-06-05 13:44:25,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:25,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:25,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:25,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:25,200 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 13:44:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:25,612 INFO L93 Difference]: Finished difference Result 8432 states and 21485 transitions. [2021-06-05 13:44:25,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:44:25,612 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 13:44:25,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:25,619 INFO L225 Difference]: With dead ends: 8432 [2021-06-05 13:44:25,619 INFO L226 Difference]: Without dead ends: 8418 [2021-06-05 13:44:25,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:25,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8418 states. [2021-06-05 13:44:25,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8418 to 6863. [2021-06-05 13:44:25,686 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 13:44:25,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6863 states to 6863 states and 18200 transitions. [2021-06-05 13:44:25,695 INFO L78 Accepts]: Start accepts. Automaton has 6863 states and 18200 transitions. Word has length 47 [2021-06-05 13:44:25,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:25,695 INFO L482 AbstractCegarLoop]: Abstraction has 6863 states and 18200 transitions. [2021-06-05 13:44:25,695 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 13:44:25,695 INFO L276 IsEmpty]: Start isEmpty. Operand 6863 states and 18200 transitions. [2021-06-05 13:44:25,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:25,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:25,699 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 13:44:25,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-05 13:44:25,899 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:25,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:25,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1400811563, now seen corresponding path program 135 times [2021-06-05 13:44:25,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:25,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358965300] [2021-06-05 13:44:25,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:25,987 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 13:44:25,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:25,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358965300] [2021-06-05 13:44:25,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358965300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:25,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228425053] [2021-06-05 13:44:25,988 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 13:44:26,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 13:44:26,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:26,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:26,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:26,144 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 13:44:26,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228425053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:26,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:26,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 13:44:26,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615588441] [2021-06-05 13:44:26,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:44:26,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:26,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:44:26,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:44:26,145 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 13:44:26,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:26,447 INFO L93 Difference]: Finished difference Result 6912 states and 18275 transitions. [2021-06-05 13:44:26,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:44:26,447 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 13:44:26,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:26,454 INFO L225 Difference]: With dead ends: 6912 [2021-06-05 13:44:26,454 INFO L226 Difference]: Without dead ends: 6880 [2021-06-05 13:44:26,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:44:26,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6880 states. [2021-06-05 13:44:26,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6880 to 6863. [2021-06-05 13:44:26,514 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 13:44:26,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6863 states to 6863 states and 18194 transitions. [2021-06-05 13:44:26,523 INFO L78 Accepts]: Start accepts. Automaton has 6863 states and 18194 transitions. Word has length 47 [2021-06-05 13:44:26,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:26,523 INFO L482 AbstractCegarLoop]: Abstraction has 6863 states and 18194 transitions. [2021-06-05 13:44:26,523 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 13:44:26,523 INFO L276 IsEmpty]: Start isEmpty. Operand 6863 states and 18194 transitions. [2021-06-05 13:44:26,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:26,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:26,527 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 13:44:26,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-06-05 13:44:26,728 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:26,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:26,728 INFO L82 PathProgramCache]: Analyzing trace with hash 118327946, now seen corresponding path program 136 times [2021-06-05 13:44:26,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:26,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221331968] [2021-06-05 13:44:26,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:26,794 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 13:44:26,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:26,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221331968] [2021-06-05 13:44:26,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221331968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:26,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193966999] [2021-06-05 13:44:26,794 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 13:44:26,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:26,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:26,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:26,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:26,925 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 13:44:26,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193966999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:26,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:26,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 13:44:26,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341519344] [2021-06-05 13:44:26,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:44:26,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:26,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:44:26,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:26,926 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 13:44:27,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:27,138 INFO L93 Difference]: Finished difference Result 8816 states and 22216 transitions. [2021-06-05 13:44:27,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:44:27,139 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 13:44:27,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:27,148 INFO L225 Difference]: With dead ends: 8816 [2021-06-05 13:44:27,148 INFO L226 Difference]: Without dead ends: 8816 [2021-06-05 13:44:27,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:44:27,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8816 states. [2021-06-05 13:44:27,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8816 to 7200. [2021-06-05 13:44:27,239 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 13:44:27,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7200 states to 7200 states and 19205 transitions. [2021-06-05 13:44:27,252 INFO L78 Accepts]: Start accepts. Automaton has 7200 states and 19205 transitions. Word has length 47 [2021-06-05 13:44:27,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:27,252 INFO L482 AbstractCegarLoop]: Abstraction has 7200 states and 19205 transitions. [2021-06-05 13:44:27,252 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 13:44:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 7200 states and 19205 transitions. [2021-06-05 13:44:27,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:27,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:27,257 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 13:44:27,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:27,457 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:27,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:27,458 INFO L82 PathProgramCache]: Analyzing trace with hash -652507721, now seen corresponding path program 68 times [2021-06-05 13:44:27,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:27,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804846043] [2021-06-05 13:44:27,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:27,530 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 13:44:27,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:27,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804846043] [2021-06-05 13:44:27,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804846043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:27,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041150261] [2021-06-05 13:44:27,531 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 13:44:27,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:27,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:27,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:27,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:27,629 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 13:44:27,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041150261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:27,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:27,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:44:27,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557971830] [2021-06-05 13:44:27,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:44:27,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:27,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:44:27,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:44:27,630 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 13:44:28,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:28,012 INFO L93 Difference]: Finished difference Result 8160 states and 21168 transitions. [2021-06-05 13:44:28,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:44:28,013 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 13:44:28,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:28,019 INFO L225 Difference]: With dead ends: 8160 [2021-06-05 13:44:28,019 INFO L226 Difference]: Without dead ends: 8160 [2021-06-05 13:44:28,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 135.0ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:28,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8160 states. [2021-06-05 13:44:28,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8160 to 7218. [2021-06-05 13:44:28,091 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 13:44:28,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 19256 transitions. [2021-06-05 13:44:28,102 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 19256 transitions. Word has length 47 [2021-06-05 13:44:28,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:28,102 INFO L482 AbstractCegarLoop]: Abstraction has 7218 states and 19256 transitions. [2021-06-05 13:44:28,102 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 13:44:28,102 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 19256 transitions. [2021-06-05 13:44:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:28,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:28,106 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 13:44:28,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:28,307 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:28,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:28,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2009163191, now seen corresponding path program 137 times [2021-06-05 13:44:28,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:28,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393801300] [2021-06-05 13:44:28,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:28,397 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 13:44:28,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:28,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393801300] [2021-06-05 13:44:28,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393801300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:28,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056635] [2021-06-05 13:44:28,397 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 13:44:28,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 13:44:28,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:28,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:28,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:28,547 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 13:44:28,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:28,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:28,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 13:44:28,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591587156] [2021-06-05 13:44:28,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:28,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:28,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:28,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:28,548 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 13:44:28,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:28,865 INFO L93 Difference]: Finished difference Result 7286 states and 19355 transitions. [2021-06-05 13:44:28,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:44:28,865 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 13:44:28,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:28,874 INFO L225 Difference]: With dead ends: 7286 [2021-06-05 13:44:28,874 INFO L226 Difference]: Without dead ends: 7266 [2021-06-05 13:44:28,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:28,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7266 states. [2021-06-05 13:44:28,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7266 to 7218. [2021-06-05 13:44:28,959 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 13:44:28,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 19253 transitions. [2021-06-05 13:44:28,971 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 19253 transitions. Word has length 47 [2021-06-05 13:44:28,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:28,971 INFO L482 AbstractCegarLoop]: Abstraction has 7218 states and 19253 transitions. [2021-06-05 13:44:28,971 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 13:44:28,971 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 19253 transitions. [2021-06-05 13:44:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:28,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:28,976 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 13:44:29,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:29,177 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:29,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:29,177 INFO L82 PathProgramCache]: Analyzing trace with hash -732216406, now seen corresponding path program 69 times [2021-06-05 13:44:29,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:29,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753757574] [2021-06-05 13:44:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:29,252 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 13:44:29,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:29,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753757574] [2021-06-05 13:44:29,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753757574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:29,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387484175] [2021-06-05 13:44:29,252 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 13:44:29,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:44:29,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:29,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:29,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:29,392 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 13:44:29,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387484175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:29,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:29,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 13:44:29,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712542611] [2021-06-05 13:44:29,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:29,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:29,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:29,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:29,397 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 13:44:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:29,592 INFO L93 Difference]: Finished difference Result 7894 states and 20581 transitions. [2021-06-05 13:44:29,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:44:29,593 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 13:44:29,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:29,604 INFO L225 Difference]: With dead ends: 7894 [2021-06-05 13:44:29,604 INFO L226 Difference]: Without dead ends: 7878 [2021-06-05 13:44:29,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:44:29,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2021-06-05 13:44:29,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 7218. [2021-06-05 13:44:29,686 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 13:44:29,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 19246 transitions. [2021-06-05 13:44:29,696 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 19246 transitions. Word has length 47 [2021-06-05 13:44:29,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:29,696 INFO L482 AbstractCegarLoop]: Abstraction has 7218 states and 19246 transitions. [2021-06-05 13:44:29,697 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 13:44:29,697 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 19246 transitions. [2021-06-05 13:44:29,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:29,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:29,701 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 13:44:29,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:29,903 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:29,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:29,903 INFO L82 PathProgramCache]: Analyzing trace with hash 330606421, now seen corresponding path program 70 times [2021-06-05 13:44:29,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:29,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138285396] [2021-06-05 13:44:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:29,976 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 13:44:29,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:29,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138285396] [2021-06-05 13:44:29,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138285396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:29,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685059099] [2021-06-05 13:44:29,976 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 13:44:30,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:30,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:30,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:30,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:30,073 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 13:44:30,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685059099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:30,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:30,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:44:30,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126315680] [2021-06-05 13:44:30,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:44:30,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:30,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:44:30,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:44:30,074 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 13:44:30,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:30,426 INFO L93 Difference]: Finished difference Result 7863 states and 20502 transitions. [2021-06-05 13:44:30,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:44:30,427 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 13:44:30,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:30,437 INFO L225 Difference]: With dead ends: 7863 [2021-06-05 13:44:30,437 INFO L226 Difference]: Without dead ends: 7855 [2021-06-05 13:44:30,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:30,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7855 states. [2021-06-05 13:44:30,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7855 to 7285. [2021-06-05 13:44:30,531 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 13:44:30,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7285 states to 7285 states and 19400 transitions. [2021-06-05 13:44:30,543 INFO L78 Accepts]: Start accepts. Automaton has 7285 states and 19400 transitions. Word has length 47 [2021-06-05 13:44:30,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:30,543 INFO L482 AbstractCegarLoop]: Abstraction has 7285 states and 19400 transitions. [2021-06-05 13:44:30,543 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 13:44:30,543 INFO L276 IsEmpty]: Start isEmpty. Operand 7285 states and 19400 transitions. [2021-06-05 13:44:30,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:30,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:30,548 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 13:44:30,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-06-05 13:44:30,749 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:30,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:30,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1830939413, now seen corresponding path program 138 times [2021-06-05 13:44:30,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:30,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474345968] [2021-06-05 13:44:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:30,817 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 13:44:30,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:30,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474345968] [2021-06-05 13:44:30,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474345968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:30,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070360314] [2021-06-05 13:44:30,818 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 13:44:30,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 13:44:30,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:30,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:30,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:30,931 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 13:44:30,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070360314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:30,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:30,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:44:30,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282367040] [2021-06-05 13:44:30,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:44:30,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:30,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:44:30,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:44:30,932 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 13:44:31,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:31,364 INFO L93 Difference]: Finished difference Result 7653 states and 20013 transitions. [2021-06-05 13:44:31,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:44:31,365 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 13:44:31,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:31,372 INFO L225 Difference]: With dead ends: 7653 [2021-06-05 13:44:31,372 INFO L226 Difference]: Without dead ends: 7538 [2021-06-05 13:44:31,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:31,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7538 states. [2021-06-05 13:44:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7538 to 7173. [2021-06-05 13:44:31,445 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 13:44:31,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7173 states to 7173 states and 19137 transitions. [2021-06-05 13:44:31,455 INFO L78 Accepts]: Start accepts. Automaton has 7173 states and 19137 transitions. Word has length 47 [2021-06-05 13:44:31,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:31,455 INFO L482 AbstractCegarLoop]: Abstraction has 7173 states and 19137 transitions. [2021-06-05 13:44:31,455 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 13:44:31,455 INFO L276 IsEmpty]: Start isEmpty. Operand 7173 states and 19137 transitions. [2021-06-05 13:44:31,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:31,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:31,459 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 13:44:31,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-05 13:44:31,659 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:31,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:31,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1217403233, now seen corresponding path program 139 times [2021-06-05 13:44:31,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:31,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448167858] [2021-06-05 13:44:31,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:31,733 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 13:44:31,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:31,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448167858] [2021-06-05 13:44:31,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448167858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:31,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59674486] [2021-06-05 13:44:31,734 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 13:44:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:31,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:31,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:31,830 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 13:44:31,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59674486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:31,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:31,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:44:31,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473677482] [2021-06-05 13:44:31,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:44:31,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:31,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:44:31,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:44:31,831 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 13:44:32,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:32,123 INFO L93 Difference]: Finished difference Result 7696 states and 20154 transitions. [2021-06-05 13:44:32,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:44:32,124 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 13:44:32,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:32,131 INFO L225 Difference]: With dead ends: 7696 [2021-06-05 13:44:32,131 INFO L226 Difference]: Without dead ends: 7684 [2021-06-05 13:44:32,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:32,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7684 states. [2021-06-05 13:44:32,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7684 to 7175. [2021-06-05 13:44:32,200 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 13:44:32,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7175 states to 7175 states and 19141 transitions. [2021-06-05 13:44:32,210 INFO L78 Accepts]: Start accepts. Automaton has 7175 states and 19141 transitions. Word has length 47 [2021-06-05 13:44:32,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:32,210 INFO L482 AbstractCegarLoop]: Abstraction has 7175 states and 19141 transitions. [2021-06-05 13:44:32,210 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 13:44:32,210 INFO L276 IsEmpty]: Start isEmpty. Operand 7175 states and 19141 transitions. [2021-06-05 13:44:32,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:32,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:32,214 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 13:44:32,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:32,414 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:32,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:32,415 INFO L82 PathProgramCache]: Analyzing trace with hash -430954270, now seen corresponding path program 140 times [2021-06-05 13:44:32,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:32,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594743184] [2021-06-05 13:44:32,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:32,475 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 13:44:32,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:32,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594743184] [2021-06-05 13:44:32,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594743184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:32,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907388140] [2021-06-05 13:44:32,475 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 13:44:32,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:32,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:32,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:32,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:32,566 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 13:44:32,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907388140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:32,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:32,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:44:32,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252799777] [2021-06-05 13:44:32,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:44:32,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:32,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:44:32,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:44:32,567 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 13:44:32,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:32,674 INFO L93 Difference]: Finished difference Result 8501 states and 21546 transitions. [2021-06-05 13:44:32,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:32,675 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 13:44:32,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:32,683 INFO L225 Difference]: With dead ends: 8501 [2021-06-05 13:44:32,683 INFO L226 Difference]: Without dead ends: 8495 [2021-06-05 13:44:32,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:44:32,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8495 states. [2021-06-05 13:44:32,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8495 to 7174. [2021-06-05 13:44:32,765 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 13:44:32,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7174 states to 7174 states and 19134 transitions. [2021-06-05 13:44:32,775 INFO L78 Accepts]: Start accepts. Automaton has 7174 states and 19134 transitions. Word has length 47 [2021-06-05 13:44:32,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:32,775 INFO L482 AbstractCegarLoop]: Abstraction has 7174 states and 19134 transitions. [2021-06-05 13:44:32,775 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 13:44:32,775 INFO L276 IsEmpty]: Start isEmpty. Operand 7174 states and 19134 transitions. [2021-06-05 13:44:32,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:32,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:32,779 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 13:44:32,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:32,980 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:32,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:32,980 INFO L82 PathProgramCache]: Analyzing trace with hash -935646729, now seen corresponding path program 141 times [2021-06-05 13:44:32,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:32,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161067665] [2021-06-05 13:44:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:32,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:33,050 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 13:44:33,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:33,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161067665] [2021-06-05 13:44:33,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161067665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:33,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802444274] [2021-06-05 13:44:33,050 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 13:44:33,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 13:44:33,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:33,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:33,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:33,149 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 13:44:33,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802444274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:33,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:33,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:44:33,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271252923] [2021-06-05 13:44:33,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:44:33,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:33,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:44:33,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:44:33,150 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 13:44:33,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:33,638 INFO L93 Difference]: Finished difference Result 8738 states and 22335 transitions. [2021-06-05 13:44:33,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:44:33,638 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 13:44:33,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:33,647 INFO L225 Difference]: With dead ends: 8738 [2021-06-05 13:44:33,647 INFO L226 Difference]: Without dead ends: 8684 [2021-06-05 13:44:33,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 204.1ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:44:33,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8684 states. [2021-06-05 13:44:33,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8684 to 7281. [2021-06-05 13:44:33,730 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 13:44:33,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7281 states to 7281 states and 19412 transitions. [2021-06-05 13:44:33,741 INFO L78 Accepts]: Start accepts. Automaton has 7281 states and 19412 transitions. Word has length 47 [2021-06-05 13:44:33,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:33,741 INFO L482 AbstractCegarLoop]: Abstraction has 7281 states and 19412 transitions. [2021-06-05 13:44:33,741 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 13:44:33,741 INFO L276 IsEmpty]: Start isEmpty. Operand 7281 states and 19412 transitions. [2021-06-05 13:44:33,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:33,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:33,745 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 13:44:33,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:33,946 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:33,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:33,946 INFO L82 PathProgramCache]: Analyzing trace with hash 596912380, now seen corresponding path program 142 times [2021-06-05 13:44:33,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:33,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601263281] [2021-06-05 13:44:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:34,010 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 13:44:34,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:34,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601263281] [2021-06-05 13:44:34,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601263281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:34,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110252802] [2021-06-05 13:44:34,011 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 13:44:34,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:34,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:34,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:34,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:34,149 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 13:44:34,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110252802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:34,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:34,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 13:44:34,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769013898] [2021-06-05 13:44:34,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:44:34,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:34,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:44:34,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:44:34,151 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 13:44:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:34,307 INFO L93 Difference]: Finished difference Result 8660 states and 21915 transitions. [2021-06-05 13:44:34,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:44:34,307 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 13:44:34,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:34,320 INFO L225 Difference]: With dead ends: 8660 [2021-06-05 13:44:34,320 INFO L226 Difference]: Without dead ends: 8642 [2021-06-05 13:44:34,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:34,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8642 states. [2021-06-05 13:44:34,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8642 to 7281. [2021-06-05 13:44:34,446 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 13:44:34,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7281 states to 7281 states and 19405 transitions. [2021-06-05 13:44:34,461 INFO L78 Accepts]: Start accepts. Automaton has 7281 states and 19405 transitions. Word has length 47 [2021-06-05 13:44:34,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:34,461 INFO L482 AbstractCegarLoop]: Abstraction has 7281 states and 19405 transitions. [2021-06-05 13:44:34,461 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 13:44:34,461 INFO L276 IsEmpty]: Start isEmpty. Operand 7281 states and 19405 transitions. [2021-06-05 13:44:34,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:34,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:34,467 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 13:44:34,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:34,667 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:34,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:34,667 INFO L82 PathProgramCache]: Analyzing trace with hash -780810195, now seen corresponding path program 143 times [2021-06-05 13:44:34,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:34,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467960034] [2021-06-05 13:44:34,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:34,746 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 13:44:34,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:34,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467960034] [2021-06-05 13:44:34,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467960034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:34,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371601560] [2021-06-05 13:44:34,746 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 13:44:34,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 13:44:34,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:34,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:34,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:34,846 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 13:44:34,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371601560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:34,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:34,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:44:34,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659913822] [2021-06-05 13:44:34,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:34,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:34,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:34,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:34,847 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 13:44:35,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:35,673 INFO L93 Difference]: Finished difference Result 11178 states and 27510 transitions. [2021-06-05 13:44:35,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 13:44:35,674 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 13:44:35,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:35,686 INFO L225 Difference]: With dead ends: 11178 [2021-06-05 13:44:35,686 INFO L226 Difference]: Without dead ends: 11010 [2021-06-05 13:44:35,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 417.7ms TimeCoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 13:44:35,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11010 states. [2021-06-05 13:44:35,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11010 to 7582. [2021-06-05 13:44:35,796 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 13:44:35,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 20135 transitions. [2021-06-05 13:44:35,810 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 20135 transitions. Word has length 47 [2021-06-05 13:44:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:35,810 INFO L482 AbstractCegarLoop]: Abstraction has 7582 states and 20135 transitions. [2021-06-05 13:44:35,810 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 13:44:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 20135 transitions. [2021-06-05 13:44:35,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:35,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:35,815 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 13:44:36,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-06-05 13:44:36,017 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:36,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:36,017 INFO L82 PathProgramCache]: Analyzing trace with hash -394207518, now seen corresponding path program 144 times [2021-06-05 13:44:36,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:36,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479452822] [2021-06-05 13:44:36,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:36,113 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 13:44:36,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:36,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479452822] [2021-06-05 13:44:36,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479452822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:36,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707740880] [2021-06-05 13:44:36,113 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 13:44:36,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 13:44:36,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:36,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:36,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:36,226 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 13:44:36,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707740880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:36,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:36,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:44:36,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445072081] [2021-06-05 13:44:36,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:36,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:36,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:36,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:36,227 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 13:44:36,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:36,387 INFO L93 Difference]: Finished difference Result 9069 states and 22840 transitions. [2021-06-05 13:44:36,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:44:36,387 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 13:44:36,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:36,398 INFO L225 Difference]: With dead ends: 9069 [2021-06-05 13:44:36,398 INFO L226 Difference]: Without dead ends: 9042 [2021-06-05 13:44:36,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:36,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9042 states. [2021-06-05 13:44:36,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9042 to 7582. [2021-06-05 13:44:36,495 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 13:44:36,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 20132 transitions. [2021-06-05 13:44:36,508 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 20132 transitions. Word has length 47 [2021-06-05 13:44:36,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:36,508 INFO L482 AbstractCegarLoop]: Abstraction has 7582 states and 20132 transitions. [2021-06-05 13:44:36,508 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 13:44:36,508 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 20132 transitions. [2021-06-05 13:44:36,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:36,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:36,513 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 13:44:36,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-06-05 13:44:36,713 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:36,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:36,713 INFO L82 PathProgramCache]: Analyzing trace with hash -840501705, now seen corresponding path program 145 times [2021-06-05 13:44:36,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:36,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302108390] [2021-06-05 13:44:36,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:36,812 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 13:44:36,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:36,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302108390] [2021-06-05 13:44:36,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302108390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:36,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660887100] [2021-06-05 13:44:36,812 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 13:44:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:36,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 13:44:36,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:36,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 13:44:36,959 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 13:44:36,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:44:36,961 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 13:44:36,961 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 13:44:36,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:44:36,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 13:44:36,969 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 13:44:36,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660887100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:36,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:36,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 13:44:36,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591967422] [2021-06-05 13:44:36,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:36,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:36,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:36,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:36,970 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 13:44:38,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:38,420 INFO L93 Difference]: Finished difference Result 16993 states and 39932 transitions. [2021-06-05 13:44:38,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 13:44:38,421 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 13:44:38,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:38,440 INFO L225 Difference]: With dead ends: 16993 [2021-06-05 13:44:38,440 INFO L226 Difference]: Without dead ends: 16471 [2021-06-05 13:44:38,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2193 ImplicationChecksByTransitivity, 853.5ms TimeCoverageRelationStatistics Valid=645, Invalid=5517, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 13:44:38,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16471 states. [2021-06-05 13:44:38,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16471 to 8142. [2021-06-05 13:44:38,583 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 13:44:38,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8142 states to 8142 states and 21477 transitions. [2021-06-05 13:44:38,596 INFO L78 Accepts]: Start accepts. Automaton has 8142 states and 21477 transitions. Word has length 47 [2021-06-05 13:44:38,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:38,596 INFO L482 AbstractCegarLoop]: Abstraction has 8142 states and 21477 transitions. [2021-06-05 13:44:38,596 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 13:44:38,596 INFO L276 IsEmpty]: Start isEmpty. Operand 8142 states and 21477 transitions. [2021-06-05 13:44:38,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:38,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:38,601 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 13:44:38,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable529 [2021-06-05 13:44:38,802 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:38,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:38,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1053071164, now seen corresponding path program 146 times [2021-06-05 13:44:38,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:38,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135167328] [2021-06-05 13:44:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:38,885 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 13:44:38,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:38,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135167328] [2021-06-05 13:44:38,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135167328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:38,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779062463] [2021-06-05 13:44:38,885 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 13:44:38,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:38,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:38,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:38,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:38,984 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 13:44:38,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779062463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:38,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:38,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:44:38,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313244350] [2021-06-05 13:44:38,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:44:38,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:38,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:44:38,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:38,985 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 13:44:39,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:39,183 INFO L93 Difference]: Finished difference Result 9828 states and 24560 transitions. [2021-06-05 13:44:39,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:44:39,183 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 13:44:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:39,194 INFO L225 Difference]: With dead ends: 9828 [2021-06-05 13:44:39,195 INFO L226 Difference]: Without dead ends: 9792 [2021-06-05 13:44:39,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:39,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9792 states. [2021-06-05 13:44:39,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9792 to 8142. [2021-06-05 13:44:39,307 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 13:44:39,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8142 states to 8142 states and 21474 transitions. [2021-06-05 13:44:39,319 INFO L78 Accepts]: Start accepts. Automaton has 8142 states and 21474 transitions. Word has length 47 [2021-06-05 13:44:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:39,319 INFO L482 AbstractCegarLoop]: Abstraction has 8142 states and 21474 transitions. [2021-06-05 13:44:39,320 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 13:44:39,320 INFO L276 IsEmpty]: Start isEmpty. Operand 8142 states and 21474 transitions. [2021-06-05 13:44:39,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:39,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:39,325 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 13:44:39,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-06-05 13:44:39,525 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:39,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:39,525 INFO L82 PathProgramCache]: Analyzing trace with hash -993815571, now seen corresponding path program 147 times [2021-06-05 13:44:39,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:39,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586878736] [2021-06-05 13:44:39,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:39,634 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 13:44:39,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:39,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586878736] [2021-06-05 13:44:39,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586878736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:39,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205565635] [2021-06-05 13:44:39,634 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 13:44:39,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 13:44:39,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:39,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:39,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:39,733 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 13:44:39,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205565635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:39,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:39,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:44:39,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014883179] [2021-06-05 13:44:39,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:44:39,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:39,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:44:39,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:44:39,733 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 13:44:41,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:41,845 INFO L93 Difference]: Finished difference Result 19383 states and 45637 transitions. [2021-06-05 13:44:41,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-06-05 13:44:41,845 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 13:44:41,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:41,864 INFO L225 Difference]: With dead ends: 19383 [2021-06-05 13:44:41,864 INFO L226 Difference]: Without dead ends: 18765 [2021-06-05 13:44:41,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6450 ImplicationChecksByTransitivity, 1587.7ms TimeCoverageRelationStatistics Valid=1455, Invalid=14547, Unknown=0, NotChecked=0, Total=16002 [2021-06-05 13:44:41,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18765 states. [2021-06-05 13:44:41,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18765 to 8971. [2021-06-05 13:44:41,999 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 13:44:42,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8971 states to 8971 states and 23486 transitions. [2021-06-05 13:44:42,012 INFO L78 Accepts]: Start accepts. Automaton has 8971 states and 23486 transitions. Word has length 47 [2021-06-05 13:44:42,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:42,012 INFO L482 AbstractCegarLoop]: Abstraction has 8971 states and 23486 transitions. [2021-06-05 13:44:42,012 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 13:44:42,013 INFO L276 IsEmpty]: Start isEmpty. Operand 8971 states and 23486 transitions. [2021-06-05 13:44:42,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:42,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:42,018 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 13:44:42,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-05 13:44:42,218 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:42,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:42,219 INFO L82 PathProgramCache]: Analyzing trace with hash -244397918, now seen corresponding path program 148 times [2021-06-05 13:44:42,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:42,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356552820] [2021-06-05 13:44:42,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:42,313 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 13:44:42,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:42,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356552820] [2021-06-05 13:44:42,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356552820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:42,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259116090] [2021-06-05 13:44:42,313 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 13:44:42,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:42,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:42,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:42,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:42,413 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 13:44:42,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259116090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:42,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:42,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 13:44:42,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22381717] [2021-06-05 13:44:42,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:44:42,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:42,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:44:42,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:44:42,414 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 13:44:42,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:42,622 INFO L93 Difference]: Finished difference Result 11009 states and 27233 transitions. [2021-06-05 13:44:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:44:42,622 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 13:44:42,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:42,632 INFO L225 Difference]: With dead ends: 11009 [2021-06-05 13:44:42,632 INFO L226 Difference]: Without dead ends: 10964 [2021-06-05 13:44:42,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:42,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10964 states. [2021-06-05 13:44:42,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10964 to 8971. [2021-06-05 13:44:42,724 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 13:44:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8971 states to 8971 states and 23483 transitions. [2021-06-05 13:44:42,736 INFO L78 Accepts]: Start accepts. Automaton has 8971 states and 23483 transitions. Word has length 47 [2021-06-05 13:44:42,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:42,736 INFO L482 AbstractCegarLoop]: Abstraction has 8971 states and 23483 transitions. [2021-06-05 13:44:42,736 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 13:44:42,736 INFO L276 IsEmpty]: Start isEmpty. Operand 8971 states and 23483 transitions. [2021-06-05 13:44:42,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:42,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:42,741 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 13:44:42,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2021-06-05 13:44:42,941 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:42,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:42,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1478005367, now seen corresponding path program 149 times [2021-06-05 13:44:42,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:42,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223367002] [2021-06-05 13:44:42,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:43,054 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 13:44:43,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:43,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223367002] [2021-06-05 13:44:43,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223367002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:43,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586483095] [2021-06-05 13:44:43,055 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 13:44:43,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 13:44:43,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:43,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:44:43,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:43,184 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 13:44:43,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586483095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:43,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:43,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:44:43,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138102598] [2021-06-05 13:44:43,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:44:43,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:43,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:44:43,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:43,185 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 13:44:43,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:43,757 INFO L93 Difference]: Finished difference Result 11682 states and 28568 transitions. [2021-06-05 13:44:43,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:44:43,757 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 13:44:43,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:43,768 INFO L225 Difference]: With dead ends: 11682 [2021-06-05 13:44:43,769 INFO L226 Difference]: Without dead ends: 10842 [2021-06-05 13:44:43,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 327.5ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:44:43,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10842 states. [2021-06-05 13:44:43,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10842 to 6870. [2021-06-05 13:44:43,850 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 13:44:43,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6870 states to 6870 states and 18457 transitions. [2021-06-05 13:44:43,861 INFO L78 Accepts]: Start accepts. Automaton has 6870 states and 18457 transitions. Word has length 47 [2021-06-05 13:44:43,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:43,861 INFO L482 AbstractCegarLoop]: Abstraction has 6870 states and 18457 transitions. [2021-06-05 13:44:43,861 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 13:44:43,861 INFO L276 IsEmpty]: Start isEmpty. Operand 6870 states and 18457 transitions. [2021-06-05 13:44:43,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:43,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:43,865 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 13:44:44,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:44,066 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:44,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:44,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1239943850, now seen corresponding path program 71 times [2021-06-05 13:44:44,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:44,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437876667] [2021-06-05 13:44:44,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:44,123 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 13:44:44,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:44,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437876667] [2021-06-05 13:44:44,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437876667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:44,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664476651] [2021-06-05 13:44:44,123 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 13:44:44,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 13:44:44,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:44,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:44,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:44,253 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 13:44:44,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664476651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:44,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:44,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 16 [2021-06-05 13:44:44,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991196200] [2021-06-05 13:44:44,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:44,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:44,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:44,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:44,254 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 13:44:44,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:44,530 INFO L93 Difference]: Finished difference Result 8334 states and 21563 transitions. [2021-06-05 13:44:44,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:44:44,531 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 13:44:44,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:44,540 INFO L225 Difference]: With dead ends: 8334 [2021-06-05 13:44:44,540 INFO L226 Difference]: Without dead ends: 8318 [2021-06-05 13:44:44,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:44,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8318 states. [2021-06-05 13:44:44,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8318 to 7293. [2021-06-05 13:44:44,617 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 13:44:44,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7293 states to 7293 states and 19589 transitions. [2021-06-05 13:44:44,628 INFO L78 Accepts]: Start accepts. Automaton has 7293 states and 19589 transitions. Word has length 47 [2021-06-05 13:44:44,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:44,628 INFO L482 AbstractCegarLoop]: Abstraction has 7293 states and 19589 transitions. [2021-06-05 13:44:44,628 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 13:44:44,628 INFO L276 IsEmpty]: Start isEmpty. Operand 7293 states and 19589 transitions. [2021-06-05 13:44:44,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:44,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:44,633 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 13:44:44,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-05 13:44:44,833 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:44,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:44,833 INFO L82 PathProgramCache]: Analyzing trace with hash 618063440, now seen corresponding path program 72 times [2021-06-05 13:44:44,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:44,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977255705] [2021-06-05 13:44:44,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:44,892 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 13:44:44,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:44,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977255705] [2021-06-05 13:44:44,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977255705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:44,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157717540] [2021-06-05 13:44:44,892 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 13:44:44,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 13:44:44,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:44,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:44,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:44,994 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 13:44:44,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157717540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:44,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:44,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 13:44:44,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661268390] [2021-06-05 13:44:44,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:44:44,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:44,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:44:44,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:44:44,995 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 13:44:45,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:45,242 INFO L93 Difference]: Finished difference Result 8900 states and 22808 transitions. [2021-06-05 13:44:45,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:44:45,242 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 13:44:45,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:45,252 INFO L225 Difference]: With dead ends: 8900 [2021-06-05 13:44:45,252 INFO L226 Difference]: Without dead ends: 8900 [2021-06-05 13:44:45,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:45,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8900 states. [2021-06-05 13:44:45,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8900 to 7296. [2021-06-05 13:44:45,330 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 13:44:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7296 states to 7296 states and 19598 transitions. [2021-06-05 13:44:45,340 INFO L78 Accepts]: Start accepts. Automaton has 7296 states and 19598 transitions. Word has length 47 [2021-06-05 13:44:45,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:45,340 INFO L482 AbstractCegarLoop]: Abstraction has 7296 states and 19598 transitions. [2021-06-05 13:44:45,340 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 13:44:45,340 INFO L276 IsEmpty]: Start isEmpty. Operand 7296 states and 19598 transitions. [2021-06-05 13:44:45,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:45,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:45,344 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 13:44:45,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:45,544 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:45,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:45,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1019509016, now seen corresponding path program 73 times [2021-06-05 13:44:45,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:45,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651636914] [2021-06-05 13:44:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:45,612 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 13:44:45,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:45,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651636914] [2021-06-05 13:44:45,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651636914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:45,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726144153] [2021-06-05 13:44:45,613 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 13:44:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:45,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:45,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:45,732 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 13:44:45,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726144153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:45,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:45,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 13 [2021-06-05 13:44:45,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497768910] [2021-06-05 13:44:45,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:44:45,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:45,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:44:45,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:44:45,733 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 13:44:46,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:46,174 INFO L93 Difference]: Finished difference Result 8356 states and 21589 transitions. [2021-06-05 13:44:46,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:44:46,174 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 13:44:46,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:46,184 INFO L225 Difference]: With dead ends: 8356 [2021-06-05 13:44:46,184 INFO L226 Difference]: Without dead ends: 8356 [2021-06-05 13:44:46,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 212.1ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:44:46,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8356 states. [2021-06-05 13:44:46,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8356 to 7143. [2021-06-05 13:44:46,292 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 13:44:46,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7143 states to 7143 states and 19215 transitions. [2021-06-05 13:44:46,302 INFO L78 Accepts]: Start accepts. Automaton has 7143 states and 19215 transitions. Word has length 47 [2021-06-05 13:44:46,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:46,302 INFO L482 AbstractCegarLoop]: Abstraction has 7143 states and 19215 transitions. [2021-06-05 13:44:46,303 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 13:44:46,303 INFO L276 IsEmpty]: Start isEmpty. Operand 7143 states and 19215 transitions. [2021-06-05 13:44:46,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:44:46,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:46,306 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 13:44:46,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:46,507 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:46,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:46,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1559844220, now seen corresponding path program 150 times [2021-06-05 13:44:46,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:46,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828112479] [2021-06-05 13:44:46,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:46,613 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 13:44:46,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:46,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828112479] [2021-06-05 13:44:46,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828112479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:46,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849437296] [2021-06-05 13:44:46,613 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 13:44:46,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:44:46,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:46,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:44:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:46,714 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 13:44:46,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849437296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:46,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:46,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 13:44:46,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235986576] [2021-06-05 13:44:46,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:44:46,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:46,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:44:46,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:46,715 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 13:44:46,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:46,935 INFO L93 Difference]: Finished difference Result 8410 states and 21506 transitions. [2021-06-05 13:44:46,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:44:46,936 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 13:44:46,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:46,943 INFO L225 Difference]: With dead ends: 8410 [2021-06-05 13:44:46,943 INFO L226 Difference]: Without dead ends: 8354 [2021-06-05 13:44:46,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:44:46,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8354 states. [2021-06-05 13:44:47,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8354 to 7152. [2021-06-05 13:44:47,027 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 13:44:47,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7152 states to 7152 states and 19229 transitions. [2021-06-05 13:44:47,038 INFO L78 Accepts]: Start accepts. Automaton has 7152 states and 19229 transitions. Word has length 47 [2021-06-05 13:44:47,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:47,038 INFO L482 AbstractCegarLoop]: Abstraction has 7152 states and 19229 transitions. [2021-06-05 13:44:47,038 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 13:44:47,038 INFO L276 IsEmpty]: Start isEmpty. Operand 7152 states and 19229 transitions. [2021-06-05 13:44:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:44:47,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:47,043 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 13:44:47,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:47,244 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:47,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:47,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2086787547, now seen corresponding path program 151 times [2021-06-05 13:44:47,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:47,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200984025] [2021-06-05 13:44:47,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:47,306 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 13:44:47,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:47,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200984025] [2021-06-05 13:44:47,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200984025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:47,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102355587] [2021-06-05 13:44:47,306 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 13:44:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:47,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:44:47,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:47,607 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 13:44:47,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102355587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:47,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:47,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15] total 22 [2021-06-05 13:44:47,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859000052] [2021-06-05 13:44:47,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:44:47,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:47,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:44:47,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:44:47,608 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 13:44:48,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:48,843 INFO L93 Difference]: Finished difference Result 9713 states and 24252 transitions. [2021-06-05 13:44:48,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 13:44:48,844 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 13:44:48,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:48,854 INFO L225 Difference]: With dead ends: 9713 [2021-06-05 13:44:48,854 INFO L226 Difference]: Without dead ends: 9671 [2021-06-05 13:44:48,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 699.6ms TimeCoverageRelationStatistics Valid=620, Invalid=2460, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 13:44:48,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9671 states. [2021-06-05 13:44:48,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9671 to 7802. [2021-06-05 13:44:48,948 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 13:44:48,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7802 states to 7802 states and 20552 transitions. [2021-06-05 13:44:48,959 INFO L78 Accepts]: Start accepts. Automaton has 7802 states and 20552 transitions. Word has length 50 [2021-06-05 13:44:48,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:48,959 INFO L482 AbstractCegarLoop]: Abstraction has 7802 states and 20552 transitions. [2021-06-05 13:44:48,960 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 13:44:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 7802 states and 20552 transitions. [2021-06-05 13:44:48,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:44:48,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:48,964 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 13:44:49,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:49,165 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:49,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:49,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1860539001, now seen corresponding path program 152 times [2021-06-05 13:44:49,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:49,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381394523] [2021-06-05 13:44:49,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:49,230 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 13:44:49,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:49,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381394523] [2021-06-05 13:44:49,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381394523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:49,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201011713] [2021-06-05 13:44:49,231 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 13:44:49,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:49,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:49,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:44:49,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:49,374 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 13:44:49,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201011713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:49,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:49,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 13:44:49,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008837240] [2021-06-05 13:44:49,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:44:49,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:49,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:44:49,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:49,375 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 13:44:49,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:49,634 INFO L93 Difference]: Finished difference Result 8830 states and 22462 transitions. [2021-06-05 13:44:49,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:49,635 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 13:44:49,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:49,642 INFO L225 Difference]: With dead ends: 8830 [2021-06-05 13:44:49,642 INFO L226 Difference]: Without dead ends: 8773 [2021-06-05 13:44:49,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:49,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8773 states. [2021-06-05 13:44:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8773 to 7820. [2021-06-05 13:44:49,716 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 13:44:49,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7820 states to 7820 states and 20587 transitions. [2021-06-05 13:44:49,726 INFO L78 Accepts]: Start accepts. Automaton has 7820 states and 20587 transitions. Word has length 50 [2021-06-05 13:44:49,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:49,726 INFO L482 AbstractCegarLoop]: Abstraction has 7820 states and 20587 transitions. [2021-06-05 13:44:49,726 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 13:44:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 7820 states and 20587 transitions. [2021-06-05 13:44:49,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:44:49,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:49,731 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 13:44:49,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:49,931 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:49,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:49,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1761499875, now seen corresponding path program 153 times [2021-06-05 13:44:49,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:49,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958165345] [2021-06-05 13:44:49,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:49,987 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 13:44:49,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:49,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958165345] [2021-06-05 13:44:49,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958165345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:49,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322147301] [2021-06-05 13:44:49,987 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 13:44:50,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 13:44:50,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:50,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:44:50,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:50,084 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 13:44:50,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322147301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:50,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:50,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 13:44:50,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889812117] [2021-06-05 13:44:50,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:44:50,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:50,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:44:50,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:50,085 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 13:44:50,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:50,347 INFO L93 Difference]: Finished difference Result 8754 states and 22356 transitions. [2021-06-05 13:44:50,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:50,347 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 13:44:50,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:50,356 INFO L225 Difference]: With dead ends: 8754 [2021-06-05 13:44:50,356 INFO L226 Difference]: Without dead ends: 8694 [2021-06-05 13:44:50,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:50,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8694 states. [2021-06-05 13:44:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8694 to 7865. [2021-06-05 13:44:50,440 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 13:44:50,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 20667 transitions. [2021-06-05 13:44:50,452 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 20667 transitions. Word has length 50 [2021-06-05 13:44:50,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:50,452 INFO L482 AbstractCegarLoop]: Abstraction has 7865 states and 20667 transitions. [2021-06-05 13:44:50,452 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 13:44:50,452 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 20667 transitions. [2021-06-05 13:44:50,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:44:50,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:50,457 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 13:44:50,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:50,657 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:50,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:50,658 INFO L82 PathProgramCache]: Analyzing trace with hash -836689913, now seen corresponding path program 154 times [2021-06-05 13:44:50,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:50,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602005038] [2021-06-05 13:44:50,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:50,712 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 13:44:50,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:50,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602005038] [2021-06-05 13:44:50,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602005038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:50,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127761394] [2021-06-05 13:44:50,713 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 13:44:50,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:50,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:50,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:44:50,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:50,805 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 13:44:50,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127761394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:50,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:50,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 13:44:50,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371454508] [2021-06-05 13:44:50,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:44:50,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:50,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:44:50,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:50,806 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 13:44:51,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:51,065 INFO L93 Difference]: Finished difference Result 8782 states and 22434 transitions. [2021-06-05 13:44:51,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:51,065 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 13:44:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:51,074 INFO L225 Difference]: With dead ends: 8782 [2021-06-05 13:44:51,075 INFO L226 Difference]: Without dead ends: 8744 [2021-06-05 13:44:51,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:51,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8744 states. [2021-06-05 13:44:51,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8744 to 7937. [2021-06-05 13:44:51,163 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 13:44:51,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7937 states to 7937 states and 20801 transitions. [2021-06-05 13:44:51,175 INFO L78 Accepts]: Start accepts. Automaton has 7937 states and 20801 transitions. Word has length 50 [2021-06-05 13:44:51,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:51,175 INFO L482 AbstractCegarLoop]: Abstraction has 7937 states and 20801 transitions. [2021-06-05 13:44:51,175 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 13:44:51,175 INFO L276 IsEmpty]: Start isEmpty. Operand 7937 states and 20801 transitions. [2021-06-05 13:44:51,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:44:51,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:51,180 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 13:44:51,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-05 13:44:51,381 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:51,381 INFO L82 PathProgramCache]: Analyzing trace with hash 391944291, now seen corresponding path program 155 times [2021-06-05 13:44:51,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:51,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070669220] [2021-06-05 13:44:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:51,436 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 13:44:51,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:51,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070669220] [2021-06-05 13:44:51,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070669220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:51,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143680528] [2021-06-05 13:44:51,437 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 13:44:51,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 13:44:51,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:51,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:44:51,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:51,533 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 13:44:51,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143680528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:51,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:51,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 13:44:51,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269018268] [2021-06-05 13:44:51,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:44:51,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:51,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:44:51,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:51,534 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 13:44:51,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:51,798 INFO L93 Difference]: Finished difference Result 8848 states and 22578 transitions. [2021-06-05 13:44:51,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:51,798 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 13:44:51,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:51,808 INFO L225 Difference]: With dead ends: 8848 [2021-06-05 13:44:51,808 INFO L226 Difference]: Without dead ends: 8814 [2021-06-05 13:44:51,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:51,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8814 states. [2021-06-05 13:44:51,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8814 to 8036. [2021-06-05 13:44:51,898 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 13:44:51,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8036 states to 8036 states and 20989 transitions. [2021-06-05 13:44:51,910 INFO L78 Accepts]: Start accepts. Automaton has 8036 states and 20989 transitions. Word has length 50 [2021-06-05 13:44:51,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:51,910 INFO L482 AbstractCegarLoop]: Abstraction has 8036 states and 20989 transitions. [2021-06-05 13:44:51,910 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 13:44:51,910 INFO L276 IsEmpty]: Start isEmpty. Operand 8036 states and 20989 transitions. [2021-06-05 13:44:51,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:44:51,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:51,915 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 13:44:52,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:52,116 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:52,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:52,116 INFO L82 PathProgramCache]: Analyzing trace with hash 922219143, now seen corresponding path program 156 times [2021-06-05 13:44:52,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:52,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572614267] [2021-06-05 13:44:52,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:52,210 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 13:44:52,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:52,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572614267] [2021-06-05 13:44:52,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572614267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:52,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395414879] [2021-06-05 13:44:52,210 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 13:44:52,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 13:44:52,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:52,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:44:52,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:52,306 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 13:44:52,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395414879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:52,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:52,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 13:44:52,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703893568] [2021-06-05 13:44:52,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:44:52,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:52,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:44:52,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:52,307 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 13:44:52,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:52,567 INFO L93 Difference]: Finished difference Result 9347 states and 23857 transitions. [2021-06-05 13:44:52,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:52,568 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 13:44:52,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:52,578 INFO L225 Difference]: With dead ends: 9347 [2021-06-05 13:44:52,578 INFO L226 Difference]: Without dead ends: 9311 [2021-06-05 13:44:52,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9311 states. [2021-06-05 13:44:52,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9311 to 8477. [2021-06-05 13:44:52,673 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 13:44:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8477 states to 8477 states and 22147 transitions. [2021-06-05 13:44:52,686 INFO L78 Accepts]: Start accepts. Automaton has 8477 states and 22147 transitions. Word has length 50 [2021-06-05 13:44:52,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:52,686 INFO L482 AbstractCegarLoop]: Abstraction has 8477 states and 22147 transitions. [2021-06-05 13:44:52,687 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 13:44:52,687 INFO L276 IsEmpty]: Start isEmpty. Operand 8477 states and 22147 transitions. [2021-06-05 13:44:52,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:44:52,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:52,692 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 13:44:52,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-06-05 13:44:52,893 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:52,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1450620387, now seen corresponding path program 157 times [2021-06-05 13:44:52,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:52,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565781275] [2021-06-05 13:44:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:52,954 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 13:44:52,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:52,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565781275] [2021-06-05 13:44:52,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565781275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:52,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754710985] [2021-06-05 13:44:52,954 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 13:44:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:52,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:44:52,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:53,047 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 13:44:53,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754710985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:53,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:53,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 13:44:53,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244444188] [2021-06-05 13:44:53,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:44:53,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:53,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:44:53,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:53,048 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 13:44:53,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:53,308 INFO L93 Difference]: Finished difference Result 9828 states and 25051 transitions. [2021-06-05 13:44:53,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:53,308 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 13:44:53,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:53,317 INFO L225 Difference]: With dead ends: 9828 [2021-06-05 13:44:53,317 INFO L226 Difference]: Without dead ends: 9803 [2021-06-05 13:44:53,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:53,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9803 states. [2021-06-05 13:44:53,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9803 to 8967. [2021-06-05 13:44:53,399 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 13:44:53,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8967 states to 8967 states and 23365 transitions. [2021-06-05 13:44:53,412 INFO L78 Accepts]: Start accepts. Automaton has 8967 states and 23365 transitions. Word has length 50 [2021-06-05 13:44:53,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:53,412 INFO L482 AbstractCegarLoop]: Abstraction has 8967 states and 23365 transitions. [2021-06-05 13:44:53,412 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 13:44:53,412 INFO L276 IsEmpty]: Start isEmpty. Operand 8967 states and 23365 transitions. [2021-06-05 13:44:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:44:53,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:53,419 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 13:44:53,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-06-05 13:44:53,620 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:53,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1040519320, now seen corresponding path program 74 times [2021-06-05 13:44:53,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:53,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970954659] [2021-06-05 13:44:53,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:53,764 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 13:44:53,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:53,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970954659] [2021-06-05 13:44:53,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970954659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:53,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222190680] [2021-06-05 13:44:53,764 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 13:44:53,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:53,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:53,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:53,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:54,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 13:44:54,606 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 13:44:54,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:44:54,609 INFO L628 ElimStorePlain]: treesize reduction 19, result has 5.0 percent of original size [2021-06-05 13:44:54,609 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 13:44:54,609 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 13:44:54,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:1 [2021-06-05 13:44:54,615 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 13:44:54,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222190680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:54,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:54,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 34 [2021-06-05 13:44:54,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678699494] [2021-06-05 13:44:54,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 13:44:54,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:54,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 13:44:54,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:44:54,615 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 13:45:06,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:06,849 INFO L93 Difference]: Finished difference Result 20584 states and 47715 transitions. [2021-06-05 13:45:06,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2021-06-05 13:45:06,850 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 13:45:06,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:06,872 INFO L225 Difference]: With dead ends: 20584 [2021-06-05 13:45:06,872 INFO L226 Difference]: Without dead ends: 19760 [2021-06-05 13:45:06,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25560 ImplicationChecksByTransitivity, 10302.6ms TimeCoverageRelationStatistics Valid=7737, Invalid=56525, Unknown=0, NotChecked=0, Total=64262 [2021-06-05 13:45:06,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19760 states. [2021-06-05 13:45:07,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19760 to 9874. [2021-06-05 13:45:07,055 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 13:45:07,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9874 states to 9874 states and 26025 transitions. [2021-06-05 13:45:07,072 INFO L78 Accepts]: Start accepts. Automaton has 9874 states and 26025 transitions. Word has length 53 [2021-06-05 13:45:07,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:07,072 INFO L482 AbstractCegarLoop]: Abstraction has 9874 states and 26025 transitions. [2021-06-05 13:45:07,072 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 13:45:07,072 INFO L276 IsEmpty]: Start isEmpty. Operand 9874 states and 26025 transitions. [2021-06-05 13:45:07,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:07,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:07,080 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 13:45:07,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:07,281 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:07,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:07,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1328551784, now seen corresponding path program 158 times [2021-06-05 13:45:07,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:07,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66773090] [2021-06-05 13:45:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:07,455 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 13:45:07,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:07,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66773090] [2021-06-05 13:45:07,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66773090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:07,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019117859] [2021-06-05 13:45:07,455 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 13:45:07,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:07,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:07,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:07,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:07,803 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 13:45:07,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019117859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:07,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:07,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:45:07,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655753087] [2021-06-05 13:45:07,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:45:07,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:07,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:45:07,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:07,803 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 13:45:08,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:08,683 INFO L93 Difference]: Finished difference Result 10122 states and 26411 transitions. [2021-06-05 13:45:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:08,683 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 13:45:08,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:08,696 INFO L225 Difference]: With dead ends: 10122 [2021-06-05 13:45:08,696 INFO L226 Difference]: Without dead ends: 10030 [2021-06-05 13:45:08,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 346.2ms TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:08,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10030 states. [2021-06-05 13:45:08,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10030 to 9858. [2021-06-05 13:45:08,820 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 13:45:08,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9858 states to 9858 states and 25944 transitions. [2021-06-05 13:45:08,836 INFO L78 Accepts]: Start accepts. Automaton has 9858 states and 25944 transitions. Word has length 53 [2021-06-05 13:45:08,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:08,836 INFO L482 AbstractCegarLoop]: Abstraction has 9858 states and 25944 transitions. [2021-06-05 13:45:08,837 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 13:45:08,837 INFO L276 IsEmpty]: Start isEmpty. Operand 9858 states and 25944 transitions. [2021-06-05 13:45:08,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:08,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:08,845 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 13:45:09,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 13:45:09,045 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:09,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:09,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1609870245, now seen corresponding path program 75 times [2021-06-05 13:45:09,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:09,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577998784] [2021-06-05 13:45:09,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:09,111 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 13:45:09,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:09,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577998784] [2021-06-05 13:45:09,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577998784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:09,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045921078] [2021-06-05 13:45:09,111 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 13:45:09,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 13:45:09,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:09,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:09,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:09,228 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 13:45:09,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045921078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:09,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:09,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 13:45:09,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41951103] [2021-06-05 13:45:09,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:09,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:09,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:09,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:09,229 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 13:45:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:09,414 INFO L93 Difference]: Finished difference Result 13958 states and 35088 transitions. [2021-06-05 13:45:09,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:45:09,414 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 13:45:09,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:09,432 INFO L225 Difference]: With dead ends: 13958 [2021-06-05 13:45:09,432 INFO L226 Difference]: Without dead ends: 13958 [2021-06-05 13:45:09,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:45:09,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13958 states. [2021-06-05 13:45:09,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13958 to 10572. [2021-06-05 13:45:09,585 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 13:45:09,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10572 states to 10572 states and 28135 transitions. [2021-06-05 13:45:09,603 INFO L78 Accepts]: Start accepts. Automaton has 10572 states and 28135 transitions. Word has length 53 [2021-06-05 13:45:09,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:09,603 INFO L482 AbstractCegarLoop]: Abstraction has 10572 states and 28135 transitions. [2021-06-05 13:45:09,604 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 13:45:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 10572 states and 28135 transitions. [2021-06-05 13:45:09,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:09,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:09,612 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 13:45:09,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-05 13:45:09,813 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:09,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:09,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2143735621, now seen corresponding path program 159 times [2021-06-05 13:45:09,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:09,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032418056] [2021-06-05 13:45:09,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:09,884 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 13:45:09,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:09,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032418056] [2021-06-05 13:45:09,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032418056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:09,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775246012] [2021-06-05 13:45:09,884 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 13:45:09,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:45:09,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:09,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:09,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:09,996 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 13:45:09,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775246012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:09,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:09,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 13:45:09,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684822265] [2021-06-05 13:45:09,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:09,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:09,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:09,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:09,997 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 13:45:10,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:10,143 INFO L93 Difference]: Finished difference Result 11271 states and 29322 transitions. [2021-06-05 13:45:10,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:45:10,143 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 13:45:10,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:10,158 INFO L225 Difference]: With dead ends: 11271 [2021-06-05 13:45:10,158 INFO L226 Difference]: Without dead ends: 11265 [2021-06-05 13:45:10,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:10,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11265 states. [2021-06-05 13:45:10,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11265 to 10496. [2021-06-05 13:45:10,273 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 13:45:10,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10496 states to 10496 states and 27896 transitions. [2021-06-05 13:45:10,288 INFO L78 Accepts]: Start accepts. Automaton has 10496 states and 27896 transitions. Word has length 53 [2021-06-05 13:45:10,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:10,288 INFO L482 AbstractCegarLoop]: Abstraction has 10496 states and 27896 transitions. [2021-06-05 13:45:10,288 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 13:45:10,288 INFO L276 IsEmpty]: Start isEmpty. Operand 10496 states and 27896 transitions. [2021-06-05 13:45:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:10,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:10,296 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 13:45:10,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-06-05 13:45:10,496 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:10,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:10,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1194965254, now seen corresponding path program 76 times [2021-06-05 13:45:10,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:10,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428923112] [2021-06-05 13:45:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:10,581 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 13:45:10,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:10,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428923112] [2021-06-05 13:45:10,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428923112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:10,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185737499] [2021-06-05 13:45:10,581 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 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 13:45:10,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:10,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:10,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:10,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:10,748 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 13:45:10,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185737499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:10,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:10,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:45:10,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975855736] [2021-06-05 13:45:10,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:10,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:10,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:10,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:10,748 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 13:45:11,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:11,159 INFO L93 Difference]: Finished difference Result 11930 states and 30766 transitions. [2021-06-05 13:45:11,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:11,159 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 13:45:11,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:11,172 INFO L225 Difference]: With dead ends: 11930 [2021-06-05 13:45:11,172 INFO L226 Difference]: Without dead ends: 11885 [2021-06-05 13:45:11,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:11,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11885 states. [2021-06-05 13:45:11,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11885 to 10613. [2021-06-05 13:45:11,286 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 13:45:11,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10613 states to 10613 states and 28189 transitions. [2021-06-05 13:45:11,303 INFO L78 Accepts]: Start accepts. Automaton has 10613 states and 28189 transitions. Word has length 53 [2021-06-05 13:45:11,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:11,303 INFO L482 AbstractCegarLoop]: Abstraction has 10613 states and 28189 transitions. [2021-06-05 13:45:11,303 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 13:45:11,303 INFO L276 IsEmpty]: Start isEmpty. Operand 10613 states and 28189 transitions. [2021-06-05 13:45:11,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:11,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:11,311 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 13:45:11,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:11,512 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:11,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:11,512 INFO L82 PathProgramCache]: Analyzing trace with hash -358731603, now seen corresponding path program 160 times [2021-06-05 13:45:11,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:11,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536144788] [2021-06-05 13:45:11,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:11,568 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 13:45:11,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:11,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536144788] [2021-06-05 13:45:11,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536144788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:11,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174805256] [2021-06-05 13:45:11,569 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 13:45:11,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:11,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:11,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:11,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:11,679 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 13:45:11,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174805256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:11,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:11,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:45:11,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307662525] [2021-06-05 13:45:11,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:45:11,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:11,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:45:11,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:45:11,680 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 13:45:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:11,856 INFO L93 Difference]: Finished difference Result 11953 states and 30528 transitions. [2021-06-05 13:45:11,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:45:11,856 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 13:45:11,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:11,869 INFO L225 Difference]: With dead ends: 11953 [2021-06-05 13:45:11,869 INFO L226 Difference]: Without dead ends: 11950 [2021-06-05 13:45:11,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:11,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11950 states. [2021-06-05 13:45:11,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11950 to 10587. [2021-06-05 13:45:11,996 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 13:45:12,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10587 states to 10587 states and 28095 transitions. [2021-06-05 13:45:12,013 INFO L78 Accepts]: Start accepts. Automaton has 10587 states and 28095 transitions. Word has length 53 [2021-06-05 13:45:12,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:12,013 INFO L482 AbstractCegarLoop]: Abstraction has 10587 states and 28095 transitions. [2021-06-05 13:45:12,013 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 13:45:12,013 INFO L276 IsEmpty]: Start isEmpty. Operand 10587 states and 28095 transitions. [2021-06-05 13:45:12,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:12,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:12,021 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 13:45:12,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:12,222 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:12,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:12,222 INFO L82 PathProgramCache]: Analyzing trace with hash -151669037, now seen corresponding path program 161 times [2021-06-05 13:45:12,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:12,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860569069] [2021-06-05 13:45:12,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:12,292 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 13:45:12,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:12,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860569069] [2021-06-05 13:45:12,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860569069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:12,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160851338] [2021-06-05 13:45:12,292 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 13:45:12,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 13:45:12,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:12,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:12,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:12,447 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 13:45:12,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160851338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:12,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:12,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2021-06-05 13:45:12,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738931896] [2021-06-05 13:45:12,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:45:12,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:12,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:45:12,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:12,449 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 13:45:12,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:12,771 INFO L93 Difference]: Finished difference Result 12225 states and 31030 transitions. [2021-06-05 13:45:12,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:45:12,772 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 13:45:12,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:12,787 INFO L225 Difference]: With dead ends: 12225 [2021-06-05 13:45:12,787 INFO L226 Difference]: Without dead ends: 12207 [2021-06-05 13:45:12,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:12,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12207 states. [2021-06-05 13:45:12,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12207 to 10208. [2021-06-05 13:45:12,902 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 13:45:12,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10208 states to 10208 states and 26984 transitions. [2021-06-05 13:45:12,916 INFO L78 Accepts]: Start accepts. Automaton has 10208 states and 26984 transitions. Word has length 53 [2021-06-05 13:45:12,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:12,916 INFO L482 AbstractCegarLoop]: Abstraction has 10208 states and 26984 transitions. [2021-06-05 13:45:12,916 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 13:45:12,916 INFO L276 IsEmpty]: Start isEmpty. Operand 10208 states and 26984 transitions. [2021-06-05 13:45:12,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:12,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:12,923 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 13:45:13,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:13,124 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:13,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:13,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1599669050, now seen corresponding path program 162 times [2021-06-05 13:45:13,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:13,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818357161] [2021-06-05 13:45:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:13,267 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 13:45:13,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:13,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818357161] [2021-06-05 13:45:13,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818357161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:13,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491381521] [2021-06-05 13:45:13,268 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 13:45:13,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 13:45:13,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:13,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:45:13,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:13,512 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 13:45:13,512 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 13:45:13,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:45:13,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:45:13,520 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 13:45:13,523 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 13:45:13,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:19 [2021-06-05 13:45:13,564 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 13:45:13,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491381521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:13,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:13,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2021-06-05 13:45:13,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499616899] [2021-06-05 13:45:13,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:45:13,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:13,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:45:13,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:13,565 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 13:45:16,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:16,112 INFO L93 Difference]: Finished difference Result 13433 states and 33117 transitions. [2021-06-05 13:45:16,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 13:45:16,112 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 13:45:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:16,129 INFO L225 Difference]: With dead ends: 13433 [2021-06-05 13:45:16,129 INFO L226 Difference]: Without dead ends: 13411 [2021-06-05 13:45:16,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2987 ImplicationChecksByTransitivity, 1543.9ms TimeCoverageRelationStatistics Valid=1527, Invalid=7403, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 13:45:16,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13411 states. [2021-06-05 13:45:16,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13411 to 10206. [2021-06-05 13:45:16,275 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 13:45:16,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10206 states to 10206 states and 26967 transitions. [2021-06-05 13:45:16,291 INFO L78 Accepts]: Start accepts. Automaton has 10206 states and 26967 transitions. Word has length 53 [2021-06-05 13:45:16,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:16,292 INFO L482 AbstractCegarLoop]: Abstraction has 10206 states and 26967 transitions. [2021-06-05 13:45:16,292 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 13:45:16,292 INFO L276 IsEmpty]: Start isEmpty. Operand 10206 states and 26967 transitions. [2021-06-05 13:45:16,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:16,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:16,300 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 13:45:16,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable586,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:16,500 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:16,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:16,501 INFO L82 PathProgramCache]: Analyzing trace with hash 2081762066, now seen corresponding path program 163 times [2021-06-05 13:45:16,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:16,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232430410] [2021-06-05 13:45:16,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:16,588 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 13:45:16,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:16,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232430410] [2021-06-05 13:45:16,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232430410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:16,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853964811] [2021-06-05 13:45:16,589 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 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 13:45:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:16,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:16,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:16,783 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 13:45:16,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853964811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:16,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:16,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:45:16,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95626839] [2021-06-05 13:45:16,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:16,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:16,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:16,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:16,783 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 13:45:17,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:17,231 INFO L93 Difference]: Finished difference Result 11323 states and 29185 transitions. [2021-06-05 13:45:17,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:17,232 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 13:45:17,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:17,245 INFO L225 Difference]: With dead ends: 11323 [2021-06-05 13:45:17,245 INFO L226 Difference]: Without dead ends: 11323 [2021-06-05 13:45:17,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:17,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11323 states. [2021-06-05 13:45:17,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11323 to 10216. [2021-06-05 13:45:17,369 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 13:45:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 26989 transitions. [2021-06-05 13:45:17,386 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 26989 transitions. Word has length 53 [2021-06-05 13:45:17,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:17,386 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 26989 transitions. [2021-06-05 13:45:17,386 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 13:45:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 26989 transitions. [2021-06-05 13:45:17,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:17,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:17,394 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 13:45:17,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 13:45:17,595 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:17,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:17,595 INFO L82 PathProgramCache]: Analyzing trace with hash -71287896, now seen corresponding path program 164 times [2021-06-05 13:45:17,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:17,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872175832] [2021-06-05 13:45:17,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:17,677 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 13:45:17,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:17,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872175832] [2021-06-05 13:45:17,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872175832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:17,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045476174] [2021-06-05 13:45:17,678 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 13:45:17,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:17,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:17,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:17,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:17,784 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 13:45:17,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045476174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:17,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:17,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:45:17,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191662154] [2021-06-05 13:45:17,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:17,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:17,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:17,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:17,785 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 13:45:18,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:18,312 INFO L93 Difference]: Finished difference Result 11942 states and 30505 transitions. [2021-06-05 13:45:18,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:45:18,312 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 13:45:18,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:18,326 INFO L225 Difference]: With dead ends: 11942 [2021-06-05 13:45:18,326 INFO L226 Difference]: Without dead ends: 11942 [2021-06-05 13:45:18,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:18,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11942 states. [2021-06-05 13:45:18,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11942 to 10248. [2021-06-05 13:45:18,466 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 13:45:18,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10248 states to 10248 states and 27064 transitions. [2021-06-05 13:45:18,485 INFO L78 Accepts]: Start accepts. Automaton has 10248 states and 27064 transitions. Word has length 53 [2021-06-05 13:45:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:18,485 INFO L482 AbstractCegarLoop]: Abstraction has 10248 states and 27064 transitions. [2021-06-05 13:45:18,485 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 13:45:18,485 INFO L276 IsEmpty]: Start isEmpty. Operand 10248 states and 27064 transitions. [2021-06-05 13:45:18,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:18,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:18,492 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 13:45:18,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:18,693 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:18,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:18,693 INFO L82 PathProgramCache]: Analyzing trace with hash -309349413, now seen corresponding path program 77 times [2021-06-05 13:45:18,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:18,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700125651] [2021-06-05 13:45:18,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:18,760 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 13:45:18,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:18,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700125651] [2021-06-05 13:45:18,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700125651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:18,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852518048] [2021-06-05 13:45:18,760 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 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 13:45:18,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 13:45:18,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:18,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:18,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:18,907 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 13:45:18,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852518048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:18,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:18,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-06-05 13:45:18,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121776500] [2021-06-05 13:45:18,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:45:18,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:18,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:45:18,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:45:18,908 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 13:45:19,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:19,153 INFO L93 Difference]: Finished difference Result 13713 states and 34190 transitions. [2021-06-05 13:45:19,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:45:19,154 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 13:45:19,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:19,170 INFO L225 Difference]: With dead ends: 13713 [2021-06-05 13:45:19,171 INFO L226 Difference]: Without dead ends: 13705 [2021-06-05 13:45:19,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:19,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13705 states. [2021-06-05 13:45:19,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13705 to 10512. [2021-06-05 13:45:19,351 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 13:45:19,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10512 states to 10512 states and 27885 transitions. [2021-06-05 13:45:19,369 INFO L78 Accepts]: Start accepts. Automaton has 10512 states and 27885 transitions. Word has length 53 [2021-06-05 13:45:19,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:19,369 INFO L482 AbstractCegarLoop]: Abstraction has 10512 states and 27885 transitions. [2021-06-05 13:45:19,369 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 13:45:19,370 INFO L276 IsEmpty]: Start isEmpty. Operand 10512 states and 27885 transitions. [2021-06-05 13:45:19,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:19,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:19,378 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 13:45:19,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-06-05 13:45:19,579 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:19,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:19,579 INFO L82 PathProgramCache]: Analyzing trace with hash -931229823, now seen corresponding path program 78 times [2021-06-05 13:45:19,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:19,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449861590] [2021-06-05 13:45:19,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:19,647 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 13:45:19,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:19,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449861590] [2021-06-05 13:45:19,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449861590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:19,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030023560] [2021-06-05 13:45:19,647 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 13:45:19,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 13:45:19,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:19,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:19,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:19,807 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 13:45:19,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030023560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:19,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:19,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-06-05 13:45:19,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377922931] [2021-06-05 13:45:19,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:45:19,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:19,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:45:19,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:45:19,808 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 13:45:20,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:20,074 INFO L93 Difference]: Finished difference Result 15140 states and 37466 transitions. [2021-06-05 13:45:20,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:45:20,075 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 13:45:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:20,094 INFO L225 Difference]: With dead ends: 15140 [2021-06-05 13:45:20,094 INFO L226 Difference]: Without dead ends: 15140 [2021-06-05 13:45:20,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:20,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15140 states. [2021-06-05 13:45:20,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15140 to 10520. [2021-06-05 13:45:20,269 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 13:45:20,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10520 states to 10520 states and 27904 transitions. [2021-06-05 13:45:20,285 INFO L78 Accepts]: Start accepts. Automaton has 10520 states and 27904 transitions. Word has length 53 [2021-06-05 13:45:20,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:20,285 INFO L482 AbstractCegarLoop]: Abstraction has 10520 states and 27904 transitions. [2021-06-05 13:45:20,285 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 13:45:20,285 INFO L276 IsEmpty]: Start isEmpty. Operand 10520 states and 27904 transitions. [2021-06-05 13:45:20,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:20,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:20,292 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 13:45:20,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:20,492 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:20,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:20,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1726165017, now seen corresponding path program 79 times [2021-06-05 13:45:20,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:20,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823201969] [2021-06-05 13:45:20,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:20,564 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 13:45:20,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:20,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823201969] [2021-06-05 13:45:20,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823201969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:20,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741281266] [2021-06-05 13:45:20,565 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 13:45:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:20,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:20,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:20,677 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 13:45:20,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741281266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:20,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:20,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 13:45:20,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748720355] [2021-06-05 13:45:20,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:45:20,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:20,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:45:20,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:45:20,678 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 13:45:20,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:20,914 INFO L93 Difference]: Finished difference Result 13839 states and 34594 transitions. [2021-06-05 13:45:20,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:45:20,914 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 13:45:20,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:20,931 INFO L225 Difference]: With dead ends: 13839 [2021-06-05 13:45:20,931 INFO L226 Difference]: Without dead ends: 13839 [2021-06-05 13:45:20,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:20,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13839 states. [2021-06-05 13:45:21,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13839 to 10344. [2021-06-05 13:45:21,066 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 13:45:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10344 states to 10344 states and 27366 transitions. [2021-06-05 13:45:21,082 INFO L78 Accepts]: Start accepts. Automaton has 10344 states and 27366 transitions. Word has length 53 [2021-06-05 13:45:21,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:21,083 INFO L482 AbstractCegarLoop]: Abstraction has 10344 states and 27366 transitions. [2021-06-05 13:45:21,083 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 13:45:21,083 INFO L276 IsEmpty]: Start isEmpty. Operand 10344 states and 27366 transitions. [2021-06-05 13:45:21,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:21,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:21,090 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 13:45:21,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:21,291 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:21,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:21,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1133718440, now seen corresponding path program 80 times [2021-06-05 13:45:21,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:21,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620961070] [2021-06-05 13:45:21,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:21,380 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 13:45:21,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:21,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620961070] [2021-06-05 13:45:21,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620961070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:21,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405840764] [2021-06-05 13:45:21,381 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 13:45:21,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:21,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:21,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:21,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:21,510 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 13:45:21,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405840764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:21,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:21,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 13:45:21,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516240996] [2021-06-05 13:45:21,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:45:21,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:21,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:45:21,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:45:21,511 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 13:45:22,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:22,114 INFO L93 Difference]: Finished difference Result 10977 states and 28511 transitions. [2021-06-05 13:45:22,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:22,114 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 13:45:22,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:22,126 INFO L225 Difference]: With dead ends: 10977 [2021-06-05 13:45:22,126 INFO L226 Difference]: Without dead ends: 10881 [2021-06-05 13:45:22,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:45:22,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10881 states. [2021-06-05 13:45:22,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10881 to 10343. [2021-06-05 13:45:22,244 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 13:45:22,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10343 states to 10343 states and 27352 transitions. [2021-06-05 13:45:22,261 INFO L78 Accepts]: Start accepts. Automaton has 10343 states and 27352 transitions. Word has length 53 [2021-06-05 13:45:22,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:22,261 INFO L482 AbstractCegarLoop]: Abstraction has 10343 states and 27352 transitions. [2021-06-05 13:45:22,261 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 13:45:22,261 INFO L276 IsEmpty]: Start isEmpty. Operand 10343 states and 27352 transitions. [2021-06-05 13:45:22,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:22,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:22,270 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 13:45:22,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:22,470 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:22,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:22,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1461271213, now seen corresponding path program 165 times [2021-06-05 13:45:22,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:22,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762795544] [2021-06-05 13:45:22,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:22,542 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 13:45:22,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:22,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762795544] [2021-06-05 13:45:22,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762795544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:22,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715396589] [2021-06-05 13:45:22,543 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 13:45:22,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:45:22,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:22,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:22,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:22,649 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 13:45:22,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715396589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:22,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:22,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:45:22,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287307142] [2021-06-05 13:45:22,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:22,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:22,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:22,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:22,650 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 13:45:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:22,887 INFO L93 Difference]: Finished difference Result 11313 states and 29024 transitions. [2021-06-05 13:45:22,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:45:22,887 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 13:45:22,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:22,899 INFO L225 Difference]: With dead ends: 11313 [2021-06-05 13:45:22,899 INFO L226 Difference]: Without dead ends: 11295 [2021-06-05 13:45:22,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:45:22,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11295 states. [2021-06-05 13:45:23,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11295 to 10343. [2021-06-05 13:45:23,020 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 13:45:23,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10343 states to 10343 states and 27342 transitions. [2021-06-05 13:45:23,036 INFO L78 Accepts]: Start accepts. Automaton has 10343 states and 27342 transitions. Word has length 53 [2021-06-05 13:45:23,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:23,036 INFO L482 AbstractCegarLoop]: Abstraction has 10343 states and 27342 transitions. [2021-06-05 13:45:23,036 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 13:45:23,036 INFO L276 IsEmpty]: Start isEmpty. Operand 10343 states and 27342 transitions. [2021-06-05 13:45:23,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:23,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:23,044 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 13:45:23,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:23,244 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:23,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:23,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1403224534, now seen corresponding path program 81 times [2021-06-05 13:45:23,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:23,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498710170] [2021-06-05 13:45:23,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:23,327 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 13:45:23,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:23,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498710170] [2021-06-05 13:45:23,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498710170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:23,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554549436] [2021-06-05 13:45:23,328 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 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 13:45:23,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 13:45:23,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:23,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:23,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:23,456 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 13:45:23,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554549436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:23,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:23,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:45:23,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589452122] [2021-06-05 13:45:23,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:23,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:23,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:23,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:23,457 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 13:45:23,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:23,910 INFO L93 Difference]: Finished difference Result 11804 states and 30259 transitions. [2021-06-05 13:45:23,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:23,911 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 13:45:23,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:23,924 INFO L225 Difference]: With dead ends: 11804 [2021-06-05 13:45:23,924 INFO L226 Difference]: Without dead ends: 11766 [2021-06-05 13:45:23,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 131.9ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:23,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11766 states. [2021-06-05 13:45:24,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11766 to 10492. [2021-06-05 13:45:24,059 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 13:45:24,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10492 states to 10492 states and 27719 transitions. [2021-06-05 13:45:24,077 INFO L78 Accepts]: Start accepts. Automaton has 10492 states and 27719 transitions. Word has length 53 [2021-06-05 13:45:24,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:24,077 INFO L482 AbstractCegarLoop]: Abstraction has 10492 states and 27719 transitions. [2021-06-05 13:45:24,077 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 13:45:24,077 INFO L276 IsEmpty]: Start isEmpty. Operand 10492 states and 27719 transitions. [2021-06-05 13:45:24,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:24,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:24,085 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 13:45:24,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 13:45:24,286 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:24,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:24,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1338045905, now seen corresponding path program 166 times [2021-06-05 13:45:24,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:24,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223477880] [2021-06-05 13:45:24,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:24,338 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 13:45:24,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:24,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223477880] [2021-06-05 13:45:24,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223477880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:24,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920154684] [2021-06-05 13:45:24,339 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 13:45:24,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:24,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:24,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:24,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:24,442 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 13:45:24,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920154684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:24,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:24,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:45:24,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707456658] [2021-06-05 13:45:24,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:45:24,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:24,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:45:24,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:45:24,443 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 13:45:24,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:24,604 INFO L93 Difference]: Finished difference Result 12007 states and 30378 transitions. [2021-06-05 13:45:24,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:45:24,604 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 13:45:24,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:24,618 INFO L225 Difference]: With dead ends: 12007 [2021-06-05 13:45:24,618 INFO L226 Difference]: Without dead ends: 12004 [2021-06-05 13:45:24,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:24,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12004 states. [2021-06-05 13:45:24,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12004 to 10472. [2021-06-05 13:45:24,743 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 13:45:24,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10472 states to 10472 states and 27643 transitions. [2021-06-05 13:45:24,759 INFO L78 Accepts]: Start accepts. Automaton has 10472 states and 27643 transitions. Word has length 53 [2021-06-05 13:45:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:24,759 INFO L482 AbstractCegarLoop]: Abstraction has 10472 states and 27643 transitions. [2021-06-05 13:45:24,759 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 13:45:24,759 INFO L276 IsEmpty]: Start isEmpty. Operand 10472 states and 27643 transitions. [2021-06-05 13:45:24,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:24,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:24,767 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 13:45:24,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-06-05 13:45:24,968 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:24,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:24,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1545108471, now seen corresponding path program 167 times [2021-06-05 13:45:24,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:24,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848800611] [2021-06-05 13:45:24,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:25,040 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 13:45:25,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:25,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848800611] [2021-06-05 13:45:25,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848800611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:25,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428271827] [2021-06-05 13:45:25,040 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 13:45:25,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 13:45:25,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:25,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:25,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:25,212 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 13:45:25,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428271827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:25,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:25,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2021-06-05 13:45:25,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836407430] [2021-06-05 13:45:25,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:25,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:25,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:25,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:25,213 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 13:45:25,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:25,523 INFO L93 Difference]: Finished difference Result 12244 states and 30811 transitions. [2021-06-05 13:45:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:25,523 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 13:45:25,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:25,537 INFO L225 Difference]: With dead ends: 12244 [2021-06-05 13:45:25,537 INFO L226 Difference]: Without dead ends: 12226 [2021-06-05 13:45:25,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:25,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12226 states. [2021-06-05 13:45:25,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12226 to 10472. [2021-06-05 13:45:25,662 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 13:45:25,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10472 states to 10472 states and 27619 transitions. [2021-06-05 13:45:25,678 INFO L78 Accepts]: Start accepts. Automaton has 10472 states and 27619 transitions. Word has length 53 [2021-06-05 13:45:25,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:25,678 INFO L482 AbstractCegarLoop]: Abstraction has 10472 states and 27619 transitions. [2021-06-05 13:45:25,678 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 13:45:25,678 INFO L276 IsEmpty]: Start isEmpty. Operand 10472 states and 27619 transitions. [2021-06-05 13:45:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:25,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:25,686 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 13:45:25,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:25,886 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:25,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:25,887 INFO L82 PathProgramCache]: Analyzing trace with hash 97108458, now seen corresponding path program 168 times [2021-06-05 13:45:25,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:25,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092466525] [2021-06-05 13:45:25,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:25,971 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 13:45:25,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:25,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092466525] [2021-06-05 13:45:25,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092466525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:25,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375136042] [2021-06-05 13:45:25,971 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 13:45:26,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 13:45:26,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:26,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:26,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:26,146 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 13:45:26,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375136042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:26,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:26,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:45:26,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504754738] [2021-06-05 13:45:26,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:26,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:26,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:26,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:26,147 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 13:45:26,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:26,762 INFO L93 Difference]: Finished difference Result 11210 states and 28930 transitions. [2021-06-05 13:45:26,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:26,762 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 13:45:26,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:26,775 INFO L225 Difference]: With dead ends: 11210 [2021-06-05 13:45:26,775 INFO L226 Difference]: Without dead ends: 11154 [2021-06-05 13:45:26,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:26,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11154 states. [2021-06-05 13:45:26,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11154 to 10444. [2021-06-05 13:45:26,898 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 13:45:26,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10444 states to 10444 states and 27517 transitions. [2021-06-05 13:45:26,915 INFO L78 Accepts]: Start accepts. Automaton has 10444 states and 27517 transitions. Word has length 53 [2021-06-05 13:45:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:26,915 INFO L482 AbstractCegarLoop]: Abstraction has 10444 states and 27517 transitions. [2021-06-05 13:45:26,915 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 13:45:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 10444 states and 27517 transitions. [2021-06-05 13:45:26,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:26,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:26,923 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 13:45:27,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-06-05 13:45:27,123 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:27,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:27,123 INFO L82 PathProgramCache]: Analyzing trace with hash -516427722, now seen corresponding path program 169 times [2021-06-05 13:45:27,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:27,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940134248] [2021-06-05 13:45:27,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:27,206 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 13:45:27,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:27,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940134248] [2021-06-05 13:45:27,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940134248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:27,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219624876] [2021-06-05 13:45:27,206 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 13:45:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:27,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:27,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:27,323 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 13:45:27,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219624876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:27,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:27,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:45:27,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340540660] [2021-06-05 13:45:27,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:27,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:27,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:27,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:27,324 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 13:45:27,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:27,790 INFO L93 Difference]: Finished difference Result 11584 states and 29771 transitions. [2021-06-05 13:45:27,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:27,790 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 13:45:27,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:27,802 INFO L225 Difference]: With dead ends: 11584 [2021-06-05 13:45:27,802 INFO L226 Difference]: Without dead ends: 11572 [2021-06-05 13:45:27,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:27,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11572 states. [2021-06-05 13:45:27,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11572 to 10490. [2021-06-05 13:45:27,923 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 13:45:27,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10490 states to 10490 states and 27620 transitions. [2021-06-05 13:45:27,939 INFO L78 Accepts]: Start accepts. Automaton has 10490 states and 27620 transitions. Word has length 53 [2021-06-05 13:45:27,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:27,939 INFO L482 AbstractCegarLoop]: Abstraction has 10490 states and 27620 transitions. [2021-06-05 13:45:27,939 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 13:45:27,940 INFO L276 IsEmpty]: Start isEmpty. Operand 10490 states and 27620 transitions. [2021-06-05 13:45:27,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:27,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:27,947 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 13:45:28,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:28,147 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:28,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:28,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1625489612, now seen corresponding path program 170 times [2021-06-05 13:45:28,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:28,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166773061] [2021-06-05 13:45:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:28,230 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 13:45:28,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:28,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166773061] [2021-06-05 13:45:28,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166773061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:28,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360252117] [2021-06-05 13:45:28,231 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 13:45:28,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:28,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:28,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:28,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:28,344 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 13:45:28,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360252117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:28,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:28,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:45:28,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724485035] [2021-06-05 13:45:28,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:28,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:28,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:28,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:28,345 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 13:45:28,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:28,897 INFO L93 Difference]: Finished difference Result 12749 states and 32307 transitions. [2021-06-05 13:45:28,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:45:28,898 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 13:45:28,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:28,912 INFO L225 Difference]: With dead ends: 12749 [2021-06-05 13:45:28,912 INFO L226 Difference]: Without dead ends: 12707 [2021-06-05 13:45:28,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:28,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12707 states. [2021-06-05 13:45:29,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12707 to 10549. [2021-06-05 13:45:29,043 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 13:45:29,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10549 states to 10549 states and 27774 transitions. [2021-06-05 13:45:29,059 INFO L78 Accepts]: Start accepts. Automaton has 10549 states and 27774 transitions. Word has length 53 [2021-06-05 13:45:29,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:29,059 INFO L482 AbstractCegarLoop]: Abstraction has 10549 states and 27774 transitions. [2021-06-05 13:45:29,059 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 13:45:29,059 INFO L276 IsEmpty]: Start isEmpty. Operand 10549 states and 27774 transitions. [2021-06-05 13:45:29,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:29,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:29,067 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 13:45:29,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:29,268 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:29,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:29,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1136918575, now seen corresponding path program 171 times [2021-06-05 13:45:29,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:29,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219164465] [2021-06-05 13:45:29,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:29,354 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 13:45:29,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:29,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219164465] [2021-06-05 13:45:29,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219164465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:29,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112994977] [2021-06-05 13:45:29,354 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 13:45:29,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 13:45:29,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:29,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:29,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:29,513 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 13:45:29,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112994977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:29,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:29,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:45:29,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553200469] [2021-06-05 13:45:29,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:29,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:29,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:29,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:29,514 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 13:45:29,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:29,740 INFO L93 Difference]: Finished difference Result 12080 states and 30433 transitions. [2021-06-05 13:45:29,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:45:29,741 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 13:45:29,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:29,753 INFO L225 Difference]: With dead ends: 12080 [2021-06-05 13:45:29,753 INFO L226 Difference]: Without dead ends: 12056 [2021-06-05 13:45:29,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:45:29,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12056 states. [2021-06-05 13:45:29,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12056 to 10182. [2021-06-05 13:45:29,861 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 13:45:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10182 states to 10182 states and 26707 transitions. [2021-06-05 13:45:29,876 INFO L78 Accepts]: Start accepts. Automaton has 10182 states and 26707 transitions. Word has length 53 [2021-06-05 13:45:29,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:29,876 INFO L482 AbstractCegarLoop]: Abstraction has 10182 states and 26707 transitions. [2021-06-05 13:45:29,876 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 13:45:29,876 INFO L276 IsEmpty]: Start isEmpty. Operand 10182 states and 26707 transitions. [2021-06-05 13:45:29,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:29,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:29,884 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 13:45:30,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:30,084 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:30,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:30,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1780326146, now seen corresponding path program 172 times [2021-06-05 13:45:30,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:30,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038978413] [2021-06-05 13:45:30,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:30,183 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 13:45:30,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:30,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038978413] [2021-06-05 13:45:30,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038978413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:30,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382402629] [2021-06-05 13:45:30,184 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 13:45:30,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:30,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:30,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:30,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:30,289 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 13:45:30,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382402629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:30,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:30,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:45:30,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202323662] [2021-06-05 13:45:30,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:45:30,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:30,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:45:30,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:45:30,290 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 13:45:30,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:30,901 INFO L93 Difference]: Finished difference Result 12810 states and 32153 transitions. [2021-06-05 13:45:30,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:45:30,902 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 13:45:30,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:30,914 INFO L225 Difference]: With dead ends: 12810 [2021-06-05 13:45:30,914 INFO L226 Difference]: Without dead ends: 12756 [2021-06-05 13:45:30,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:45:30,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12756 states. [2021-06-05 13:45:31,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12756 to 10143. [2021-06-05 13:45:31,037 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 13:45:31,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10143 states to 10143 states and 26575 transitions. [2021-06-05 13:45:31,055 INFO L78 Accepts]: Start accepts. Automaton has 10143 states and 26575 transitions. Word has length 53 [2021-06-05 13:45:31,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:31,055 INFO L482 AbstractCegarLoop]: Abstraction has 10143 states and 26575 transitions. [2021-06-05 13:45:31,055 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 13:45:31,055 INFO L276 IsEmpty]: Start isEmpty. Operand 10143 states and 26575 transitions. [2021-06-05 13:45:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:31,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:31,063 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 13:45:31,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-06-05 13:45:31,264 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:31,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:31,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1542264629, now seen corresponding path program 82 times [2021-06-05 13:45:31,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:31,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135532405] [2021-06-05 13:45:31,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:31,324 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 13:45:31,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:31,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135532405] [2021-06-05 13:45:31,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135532405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:31,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469339610] [2021-06-05 13:45:31,324 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 13:45:31,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:31,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:31,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:31,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:31,433 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 13:45:31,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469339610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:31,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:31,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 13:45:31,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078331324] [2021-06-05 13:45:31,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:31,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:31,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:31,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:31,434 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 13:45:31,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:31,616 INFO L93 Difference]: Finished difference Result 13236 states and 32994 transitions. [2021-06-05 13:45:31,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:45:31,616 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 13:45:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:31,632 INFO L225 Difference]: With dead ends: 13236 [2021-06-05 13:45:31,632 INFO L226 Difference]: Without dead ends: 13222 [2021-06-05 13:45:31,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:45:31,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13222 states. [2021-06-05 13:45:31,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13222 to 10426. [2021-06-05 13:45:31,759 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 13:45:31,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10426 states to 10426 states and 27393 transitions. [2021-06-05 13:45:31,776 INFO L78 Accepts]: Start accepts. Automaton has 10426 states and 27393 transitions. Word has length 53 [2021-06-05 13:45:31,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:31,776 INFO L482 AbstractCegarLoop]: Abstraction has 10426 states and 27393 transitions. [2021-06-05 13:45:31,776 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 13:45:31,776 INFO L276 IsEmpty]: Start isEmpty. Operand 10426 states and 27393 transitions. [2021-06-05 13:45:31,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:31,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:31,784 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 13:45:31,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2021-06-05 13:45:31,985 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:31,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:31,985 INFO L82 PathProgramCache]: Analyzing trace with hash 920384219, now seen corresponding path program 83 times [2021-06-05 13:45:31,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:31,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963459102] [2021-06-05 13:45:31,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:32,044 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 13:45:32,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:32,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963459102] [2021-06-05 13:45:32,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963459102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:32,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206324650] [2021-06-05 13:45:32,045 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 13:45:32,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 13:45:32,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:32,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:32,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:32,220 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 13:45:32,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206324650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:32,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:32,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 18 [2021-06-05 13:45:32,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638651930] [2021-06-05 13:45:32,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:32,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:32,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:32,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:32,221 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 13:45:32,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:32,594 INFO L93 Difference]: Finished difference Result 16570 states and 40721 transitions. [2021-06-05 13:45:32,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:45:32,594 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 13:45:32,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:32,653 INFO L225 Difference]: With dead ends: 16570 [2021-06-05 13:45:32,653 INFO L226 Difference]: Without dead ends: 16570 [2021-06-05 13:45:32,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:32,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16570 states. [2021-06-05 13:45:32,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16570 to 10440. [2021-06-05 13:45:32,779 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 13:45:32,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10440 states to 10440 states and 27430 transitions. [2021-06-05 13:45:32,795 INFO L78 Accepts]: Start accepts. Automaton has 10440 states and 27430 transitions. Word has length 53 [2021-06-05 13:45:32,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:32,795 INFO L482 AbstractCegarLoop]: Abstraction has 10440 states and 27430 transitions. [2021-06-05 13:45:32,795 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 13:45:32,795 INFO L276 IsEmpty]: Start isEmpty. Operand 10440 states and 27430 transitions. [2021-06-05 13:45:32,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:32,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:32,802 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 13:45:33,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:33,003 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:33,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:33,003 INFO L82 PathProgramCache]: Analyzing trace with hash -717188237, now seen corresponding path program 84 times [2021-06-05 13:45:33,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:33,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500206515] [2021-06-05 13:45:33,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:33,073 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 13:45:33,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:33,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500206515] [2021-06-05 13:45:33,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500206515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:33,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015431832] [2021-06-05 13:45:33,073 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 13:45:33,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 13:45:33,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:33,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:45:33,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:33,209 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 13:45:33,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015431832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:33,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:33,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-06-05 13:45:33,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965311463] [2021-06-05 13:45:33,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:45:33,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:33,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:45:33,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:45:33,210 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 13:45:33,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:33,496 INFO L93 Difference]: Finished difference Result 13184 states and 32800 transitions. [2021-06-05 13:45:33,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:45:33,497 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 13:45:33,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:33,514 INFO L225 Difference]: With dead ends: 13184 [2021-06-05 13:45:33,514 INFO L226 Difference]: Without dead ends: 13184 [2021-06-05 13:45:33,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:45:33,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13184 states. [2021-06-05 13:45:33,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13184 to 10216. [2021-06-05 13:45:33,653 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 13:45:33,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 26779 transitions. [2021-06-05 13:45:33,670 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 26779 transitions. Word has length 53 [2021-06-05 13:45:33,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:33,670 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 26779 transitions. [2021-06-05 13:45:33,670 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 13:45:33,670 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 26779 transitions. [2021-06-05 13:45:33,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:33,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:33,679 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 13:45:33,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2021-06-05 13:45:33,879 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:33,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:33,879 INFO L82 PathProgramCache]: Analyzing trace with hash -2128038473, now seen corresponding path program 173 times [2021-06-05 13:45:33,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:33,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335986791] [2021-06-05 13:45:33,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:33,958 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 13:45:33,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:33,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335986791] [2021-06-05 13:45:33,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335986791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:33,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058442648] [2021-06-05 13:45:33,959 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 13:45:33,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:45:33,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:33,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:33,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:34,100 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 13:45:34,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058442648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:34,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:34,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 17 [2021-06-05 13:45:34,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133886630] [2021-06-05 13:45:34,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:45:34,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:34,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:45:34,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:45:34,101 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 13:45:34,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:34,405 INFO L93 Difference]: Finished difference Result 11730 states and 29482 transitions. [2021-06-05 13:45:34,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:45:34,405 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 13:45:34,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:34,418 INFO L225 Difference]: With dead ends: 11730 [2021-06-05 13:45:34,418 INFO L226 Difference]: Without dead ends: 11703 [2021-06-05 13:45:34,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:45:34,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11703 states. [2021-06-05 13:45:34,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11703 to 10216. [2021-06-05 13:45:34,540 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 13:45:34,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 26770 transitions. [2021-06-05 13:45:34,557 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 26770 transitions. Word has length 53 [2021-06-05 13:45:34,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:34,557 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 26770 transitions. [2021-06-05 13:45:34,557 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 13:45:34,557 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 26770 transitions. [2021-06-05 13:45:34,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:34,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:34,565 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 13:45:34,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:34,765 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:34,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:34,765 INFO L82 PathProgramCache]: Analyzing trace with hash -174590330, now seen corresponding path program 85 times [2021-06-05 13:45:34,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:34,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300355681] [2021-06-05 13:45:34,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:34,853 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 13:45:34,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:34,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300355681] [2021-06-05 13:45:34,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300355681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:34,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269967191] [2021-06-05 13:45:34,853 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 13:45:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:34,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:34,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:34,961 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 13:45:34,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269967191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:34,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:34,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:45:34,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691473827] [2021-06-05 13:45:34,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:34,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:34,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:34,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:34,962 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 13:45:35,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:35,389 INFO L93 Difference]: Finished difference Result 11688 states and 29696 transitions. [2021-06-05 13:45:35,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:35,389 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 13:45:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:35,403 INFO L225 Difference]: With dead ends: 11688 [2021-06-05 13:45:35,403 INFO L226 Difference]: Without dead ends: 11657 [2021-06-05 13:45:35,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:35,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11657 states. [2021-06-05 13:45:35,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11657 to 10380. [2021-06-05 13:45:35,532 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 13:45:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10380 states to 10380 states and 27179 transitions. [2021-06-05 13:45:35,615 INFO L78 Accepts]: Start accepts. Automaton has 10380 states and 27179 transitions. Word has length 53 [2021-06-05 13:45:35,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:35,615 INFO L482 AbstractCegarLoop]: Abstraction has 10380 states and 27179 transitions. [2021-06-05 13:45:35,615 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 13:45:35,615 INFO L276 IsEmpty]: Start isEmpty. Operand 10380 states and 27179 transitions. [2021-06-05 13:45:35,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:35,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:35,623 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 13:45:35,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2021-06-05 13:45:35,823 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:35,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:35,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1728287187, now seen corresponding path program 174 times [2021-06-05 13:45:35,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:35,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979629649] [2021-06-05 13:45:35,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:35,874 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 13:45:35,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:35,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979629649] [2021-06-05 13:45:35,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979629649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:35,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781842464] [2021-06-05 13:45:35,874 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 13:45:35,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 13:45:35,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:35,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:35,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:35,981 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 13:45:35,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781842464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:35,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:35,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:45:35,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686502927] [2021-06-05 13:45:35,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:45:35,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:35,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:45:35,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:45:35,982 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 13:45:36,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:36,135 INFO L93 Difference]: Finished difference Result 12057 states and 30158 transitions. [2021-06-05 13:45:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:45:36,135 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 13:45:36,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:36,149 INFO L225 Difference]: With dead ends: 12057 [2021-06-05 13:45:36,149 INFO L226 Difference]: Without dead ends: 12054 [2021-06-05 13:45:36,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:36,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12054 states. [2021-06-05 13:45:36,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12054 to 10366. [2021-06-05 13:45:36,284 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 13:45:36,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 27123 transitions. [2021-06-05 13:45:36,301 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 27123 transitions. Word has length 53 [2021-06-05 13:45:36,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:36,301 INFO L482 AbstractCegarLoop]: Abstraction has 10366 states and 27123 transitions. [2021-06-05 13:45:36,301 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 13:45:36,301 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 27123 transitions. [2021-06-05 13:45:36,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:36,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:36,310 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 13:45:36,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-05 13:45:36,510 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:36,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:36,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1521224621, now seen corresponding path program 175 times [2021-06-05 13:45:36,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:36,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203814633] [2021-06-05 13:45:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:36,570 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 13:45:36,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:36,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203814633] [2021-06-05 13:45:36,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203814633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:36,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204607995] [2021-06-05 13:45:36,571 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 13:45:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:36,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:36,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:36,675 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 13:45:36,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204607995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:36,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:36,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 13:45:36,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830478297] [2021-06-05 13:45:36,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:36,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:36,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:36,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:36,676 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 13:45:36,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:36,855 INFO L93 Difference]: Finished difference Result 12079 states and 30151 transitions. [2021-06-05 13:45:36,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:45:36,856 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 13:45:36,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:36,870 INFO L225 Difference]: With dead ends: 12079 [2021-06-05 13:45:36,870 INFO L226 Difference]: Without dead ends: 12061 [2021-06-05 13:45:36,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:45:36,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12061 states. [2021-06-05 13:45:36,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12061 to 10366. [2021-06-05 13:45:37,003 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 13:45:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 27099 transitions. [2021-06-05 13:45:37,021 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 27099 transitions. Word has length 53 [2021-06-05 13:45:37,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:37,021 INFO L482 AbstractCegarLoop]: Abstraction has 10366 states and 27099 transitions. [2021-06-05 13:45:37,021 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 13:45:37,021 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 27099 transitions. [2021-06-05 13:45:37,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:37,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:37,029 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 13:45:37,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:37,230 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:37,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:37,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1325742662, now seen corresponding path program 176 times [2021-06-05 13:45:37,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:37,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327107163] [2021-06-05 13:45:37,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:37,308 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 13:45:37,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:37,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327107163] [2021-06-05 13:45:37,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327107163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:37,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787263236] [2021-06-05 13:45:37,308 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 13:45:37,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:37,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:37,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:37,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:37,429 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 13:45:37,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787263236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:37,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:37,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:45:37,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076407609] [2021-06-05 13:45:37,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:37,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:37,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:37,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:37,430 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 13:45:38,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:38,046 INFO L93 Difference]: Finished difference Result 11156 states and 28494 transitions. [2021-06-05 13:45:38,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:38,046 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 13:45:38,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:38,059 INFO L225 Difference]: With dead ends: 11156 [2021-06-05 13:45:38,059 INFO L226 Difference]: Without dead ends: 11082 [2021-06-05 13:45:38,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:38,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11082 states. [2021-06-05 13:45:38,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11082 to 10344. [2021-06-05 13:45:38,186 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 13:45:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10344 states to 10344 states and 26998 transitions. [2021-06-05 13:45:38,202 INFO L78 Accepts]: Start accepts. Automaton has 10344 states and 26998 transitions. Word has length 53 [2021-06-05 13:45:38,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:38,202 INFO L482 AbstractCegarLoop]: Abstraction has 10344 states and 26998 transitions. [2021-06-05 13:45:38,202 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 13:45:38,202 INFO L276 IsEmpty]: Start isEmpty. Operand 10344 states and 26998 transitions. [2021-06-05 13:45:38,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:38,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:38,210 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 13:45:38,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:38,410 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:38,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:38,411 INFO L82 PathProgramCache]: Analyzing trace with hash 712206482, now seen corresponding path program 177 times [2021-06-05 13:45:38,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:38,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137281632] [2021-06-05 13:45:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:38,494 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 13:45:38,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:38,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137281632] [2021-06-05 13:45:38,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137281632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:38,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006172416] [2021-06-05 13:45:38,494 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 13:45:38,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 13:45:38,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:38,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:38,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:38,603 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 13:45:38,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006172416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:38,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:38,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:45:38,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88206507] [2021-06-05 13:45:38,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:38,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:38,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:38,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:38,604 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 13:45:39,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:39,063 INFO L93 Difference]: Finished difference Result 11598 states and 29476 transitions. [2021-06-05 13:45:39,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:39,063 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 13:45:39,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:39,075 INFO L225 Difference]: With dead ends: 11598 [2021-06-05 13:45:39,075 INFO L226 Difference]: Without dead ends: 11586 [2021-06-05 13:45:39,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:39,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11586 states. [2021-06-05 13:45:39,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11586 to 10414. [2021-06-05 13:45:39,203 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 13:45:39,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10414 states to 10414 states and 27165 transitions. [2021-06-05 13:45:39,220 INFO L78 Accepts]: Start accepts. Automaton has 10414 states and 27165 transitions. Word has length 53 [2021-06-05 13:45:39,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:39,220 INFO L482 AbstractCegarLoop]: Abstraction has 10414 states and 27165 transitions. [2021-06-05 13:45:39,221 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 13:45:39,221 INFO L276 IsEmpty]: Start isEmpty. Operand 10414 states and 27165 transitions. [2021-06-05 13:45:39,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:39,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:39,229 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 13:45:39,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-05 13:45:39,429 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:39,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:39,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1440843480, now seen corresponding path program 178 times [2021-06-05 13:45:39,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:39,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9216875] [2021-06-05 13:45:39,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:39,512 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 13:45:39,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:39,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9216875] [2021-06-05 13:45:39,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9216875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:39,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927493479] [2021-06-05 13:45:39,512 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 13:45:39,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:39,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:39,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:39,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:39,619 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 13:45:39,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927493479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:39,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:39,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:45:39,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632614871] [2021-06-05 13:45:39,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:39,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:39,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:39,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:39,620 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 13:45:40,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:40,235 INFO L93 Difference]: Finished difference Result 13130 states and 32846 transitions. [2021-06-05 13:45:40,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:45:40,235 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 13:45:40,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:40,250 INFO L225 Difference]: With dead ends: 13130 [2021-06-05 13:45:40,250 INFO L226 Difference]: Without dead ends: 13076 [2021-06-05 13:45:40,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 194.0ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:40,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13076 states. [2021-06-05 13:45:40,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13076 to 10595. [2021-06-05 13:45:40,382 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 13:45:40,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10595 states to 10595 states and 27641 transitions. [2021-06-05 13:45:40,399 INFO L78 Accepts]: Start accepts. Automaton has 10595 states and 27641 transitions. Word has length 53 [2021-06-05 13:45:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:40,399 INFO L482 AbstractCegarLoop]: Abstraction has 10595 states and 27641 transitions. [2021-06-05 13:45:40,399 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 13:45:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 10595 states and 27641 transitions. [2021-06-05 13:45:40,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:40,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:40,406 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 13:45:40,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-05 13:45:40,607 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:40,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:40,607 INFO L82 PathProgramCache]: Analyzing trace with hash 91715629, now seen corresponding path program 179 times [2021-06-05 13:45:40,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:40,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872864187] [2021-06-05 13:45:40,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:40,675 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 13:45:40,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:40,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872864187] [2021-06-05 13:45:40,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872864187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:40,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993345374] [2021-06-05 13:45:40,675 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 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 13:45:40,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 13:45:40,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:40,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:40,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:40,808 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 13:45:40,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993345374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:40,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:40,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 15 [2021-06-05 13:45:40,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624259540] [2021-06-05 13:45:40,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:40,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:40,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:40,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:40,809 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 13:45:41,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:41,082 INFO L93 Difference]: Finished difference Result 12473 states and 30997 transitions. [2021-06-05 13:45:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:45:41,082 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 13:45:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:41,096 INFO L225 Difference]: With dead ends: 12473 [2021-06-05 13:45:41,096 INFO L226 Difference]: Without dead ends: 12449 [2021-06-05 13:45:41,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:41,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12449 states. [2021-06-05 13:45:41,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12449 to 10595. [2021-06-05 13:45:41,217 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 13:45:41,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10595 states to 10595 states and 27624 transitions. [2021-06-05 13:45:41,233 INFO L78 Accepts]: Start accepts. Automaton has 10595 states and 27624 transitions. Word has length 53 [2021-06-05 13:45:41,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:41,233 INFO L482 AbstractCegarLoop]: Abstraction has 10595 states and 27624 transitions. [2021-06-05 13:45:41,233 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 13:45:41,234 INFO L276 IsEmpty]: Start isEmpty. Operand 10595 states and 27624 transitions. [2021-06-05 13:45:41,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:41,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:41,241 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 13:45:41,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:41,442 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:41,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:41,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1286006946, now seen corresponding path program 180 times [2021-06-05 13:45:41,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:41,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37472142] [2021-06-05 13:45:41,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:41,532 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 13:45:41,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:41,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37472142] [2021-06-05 13:45:41,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37472142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:41,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601872734] [2021-06-05 13:45:41,533 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 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 13:45:41,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 13:45:41,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:41,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:41,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:41,641 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 13:45:41,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601872734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:41,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:41,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:45:41,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38997497] [2021-06-05 13:45:41,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:45:41,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:41,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:45:41,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:45:41,642 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 13:45:42,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:42,440 INFO L93 Difference]: Finished difference Result 15502 states and 38128 transitions. [2021-06-05 13:45:42,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 13:45:42,440 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 13:45:42,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:42,455 INFO L225 Difference]: With dead ends: 15502 [2021-06-05 13:45:42,455 INFO L226 Difference]: Without dead ends: 15388 [2021-06-05 13:45:42,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 321.2ms TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:45:42,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15388 states. [2021-06-05 13:45:42,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15388 to 10752. [2021-06-05 13:45:42,588 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 13:45:42,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10752 states to 10752 states and 28038 transitions. [2021-06-05 13:45:42,604 INFO L78 Accepts]: Start accepts. Automaton has 10752 states and 28038 transitions. Word has length 53 [2021-06-05 13:45:42,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:42,604 INFO L482 AbstractCegarLoop]: Abstraction has 10752 states and 28038 transitions. [2021-06-05 13:45:42,604 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 13:45:42,604 INFO L276 IsEmpty]: Start isEmpty. Operand 10752 states and 28038 transitions. [2021-06-05 13:45:42,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:42,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:42,612 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 13:45:42,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:42,812 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:42,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:42,813 INFO L82 PathProgramCache]: Analyzing trace with hash -899404269, now seen corresponding path program 181 times [2021-06-05 13:45:42,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:42,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759093236] [2021-06-05 13:45:42,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:42,894 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 13:45:42,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:42,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759093236] [2021-06-05 13:45:42,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759093236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:42,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964677781] [2021-06-05 13:45:42,894 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 13:45:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:42,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:42,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:43,000 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 13:45:43,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964677781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:43,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:43,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:45:43,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653377434] [2021-06-05 13:45:43,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:45:43,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:43,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:45:43,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:45:43,000 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 13:45:43,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:43,236 INFO L93 Difference]: Finished difference Result 12521 states and 31155 transitions. [2021-06-05 13:45:43,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:45:43,237 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 13:45:43,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:43,253 INFO L225 Difference]: With dead ends: 12521 [2021-06-05 13:45:43,253 INFO L226 Difference]: Without dead ends: 12488 [2021-06-05 13:45:43,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:43,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12488 states. [2021-06-05 13:45:43,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12488 to 10400. [2021-06-05 13:45:43,375 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 13:45:43,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10400 states to 10400 states and 27035 transitions. [2021-06-05 13:45:43,391 INFO L78 Accepts]: Start accepts. Automaton has 10400 states and 27035 transitions. Word has length 53 [2021-06-05 13:45:43,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:43,391 INFO L482 AbstractCegarLoop]: Abstraction has 10400 states and 27035 transitions. [2021-06-05 13:45:43,391 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 13:45:43,392 INFO L276 IsEmpty]: Start isEmpty. Operand 10400 states and 27035 transitions. [2021-06-05 13:45:43,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:43,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:43,399 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 13:45:43,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:43,600 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:43,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:43,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1345698456, now seen corresponding path program 182 times [2021-06-05 13:45:43,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:43,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891731495] [2021-06-05 13:45:43,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:43,700 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 13:45:43,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:43,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891731495] [2021-06-05 13:45:43,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891731495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:43,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201066130] [2021-06-05 13:45:43,701 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 13:45:43,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:43,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:43,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:43,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:43,806 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 13:45:43,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201066130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:43,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:43,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:45:43,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619154375] [2021-06-05 13:45:43,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:45:43,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:43,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:45:43,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:45:43,807 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 13:45:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:44,436 INFO L93 Difference]: Finished difference Result 14179 states and 34868 transitions. [2021-06-05 13:45:44,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:45:44,436 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 13:45:44,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:44,451 INFO L225 Difference]: With dead ends: 14179 [2021-06-05 13:45:44,451 INFO L226 Difference]: Without dead ends: 14023 [2021-06-05 13:45:44,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 232.3ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:45:44,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14023 states. [2021-06-05 13:45:44,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14023 to 10040. [2021-06-05 13:45:44,568 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 13:45:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10040 states to 10040 states and 26030 transitions. [2021-06-05 13:45:44,582 INFO L78 Accepts]: Start accepts. Automaton has 10040 states and 26030 transitions. Word has length 53 [2021-06-05 13:45:44,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:44,582 INFO L482 AbstractCegarLoop]: Abstraction has 10040 states and 26030 transitions. [2021-06-05 13:45:44,582 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 13:45:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 10040 states and 26030 transitions. [2021-06-05 13:45:44,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:44,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:44,589 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 13:45:44,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-06-05 13:45:44,790 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:44,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:44,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1583759973, now seen corresponding path program 86 times [2021-06-05 13:45:44,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:44,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322286968] [2021-06-05 13:45:44,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:44,849 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 13:45:44,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:44,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322286968] [2021-06-05 13:45:44,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322286968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:44,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5681898] [2021-06-05 13:45:44,850 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 13:45:44,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:44,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:44,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:44,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:44,958 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 13:45:44,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5681898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:44,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:44,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 13:45:44,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423300342] [2021-06-05 13:45:44,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:44,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:44,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:44,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:44,959 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 13:45:45,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:45,158 INFO L93 Difference]: Finished difference Result 12926 states and 32056 transitions. [2021-06-05 13:45:45,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:45:45,158 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 13:45:45,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:45,174 INFO L225 Difference]: With dead ends: 12926 [2021-06-05 13:45:45,174 INFO L226 Difference]: Without dead ends: 12912 [2021-06-05 13:45:45,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:45:45,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12912 states. [2021-06-05 13:45:45,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12912 to 10415. [2021-06-05 13:45:45,358 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 13:45:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10415 states to 10415 states and 27102 transitions. [2021-06-05 13:45:45,375 INFO L78 Accepts]: Start accepts. Automaton has 10415 states and 27102 transitions. Word has length 53 [2021-06-05 13:45:45,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:45,375 INFO L482 AbstractCegarLoop]: Abstraction has 10415 states and 27102 transitions. [2021-06-05 13:45:45,375 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 13:45:45,375 INFO L276 IsEmpty]: Start isEmpty. Operand 10415 states and 27102 transitions. [2021-06-05 13:45:45,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:45,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:45,382 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 13:45:45,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-06-05 13:45:45,583 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:45,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:45,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2089326913, now seen corresponding path program 87 times [2021-06-05 13:45:45,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:45,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371925006] [2021-06-05 13:45:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:45,643 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 13:45:45,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:45,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371925006] [2021-06-05 13:45:45,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371925006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:45,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812955836] [2021-06-05 13:45:45,643 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 13:45:45,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 13:45:45,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:45,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:45:45,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:45,766 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 13:45:45,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812955836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:45,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:45,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-06-05 13:45:45,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018268832] [2021-06-05 13:45:45,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:45:45,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:45,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:45:45,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:45:45,767 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 13:45:46,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:46,050 INFO L93 Difference]: Finished difference Result 13428 states and 33227 transitions. [2021-06-05 13:45:46,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:46,051 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 13:45:46,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:46,065 INFO L225 Difference]: With dead ends: 13428 [2021-06-05 13:45:46,065 INFO L226 Difference]: Without dead ends: 13428 [2021-06-05 13:45:46,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:46,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13428 states. [2021-06-05 13:45:46,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13428 to 10022. [2021-06-05 13:45:46,186 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 13:45:46,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10022 states to 10022 states and 26006 transitions. [2021-06-05 13:45:46,201 INFO L78 Accepts]: Start accepts. Automaton has 10022 states and 26006 transitions. Word has length 53 [2021-06-05 13:45:46,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:46,201 INFO L482 AbstractCegarLoop]: Abstraction has 10022 states and 26006 transitions. [2021-06-05 13:45:46,201 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 13:45:46,201 INFO L276 IsEmpty]: Start isEmpty. Operand 10022 states and 26006 transitions. [2021-06-05 13:45:46,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:46,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:46,208 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 13:45:46,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-06-05 13:45:46,409 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:46,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:46,409 INFO L82 PathProgramCache]: Analyzing trace with hash 547874413, now seen corresponding path program 183 times [2021-06-05 13:45:46,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:46,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992828468] [2021-06-05 13:45:46,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:46,498 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 13:45:46,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:46,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992828468] [2021-06-05 13:45:46,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992828468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:46,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98310578] [2021-06-05 13:45:46,498 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 13:45:46,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:45:46,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:46,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:46,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:46,608 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 13:45:46,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98310578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:46,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:46,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 13:45:46,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819802961] [2021-06-05 13:45:46,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:45:46,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:46,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:45:46,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:45:46,609 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 13:45:46,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:46,885 INFO L93 Difference]: Finished difference Result 11503 states and 28619 transitions. [2021-06-05 13:45:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:45:46,886 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 13:45:46,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:46,898 INFO L225 Difference]: With dead ends: 11503 [2021-06-05 13:45:46,898 INFO L226 Difference]: Without dead ends: 11467 [2021-06-05 13:45:46,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:46,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11467 states. [2021-06-05 13:45:47,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11467 to 10022. [2021-06-05 13:45:47,014 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 13:45:47,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10022 states to 10022 states and 25997 transitions. [2021-06-05 13:45:47,031 INFO L78 Accepts]: Start accepts. Automaton has 10022 states and 25997 transitions. Word has length 53 [2021-06-05 13:45:47,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:47,031 INFO L482 AbstractCegarLoop]: Abstraction has 10022 states and 25997 transitions. [2021-06-05 13:45:47,031 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 13:45:47,031 INFO L276 IsEmpty]: Start isEmpty. Operand 10022 states and 25997 transitions. [2021-06-05 13:45:47,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:47,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:47,039 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 13:45:47,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable648,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:47,240 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:47,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:47,240 INFO L82 PathProgramCache]: Analyzing trace with hash 355684522, now seen corresponding path program 88 times [2021-06-05 13:45:47,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:47,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265912809] [2021-06-05 13:45:47,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:47,324 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 13:45:47,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:47,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265912809] [2021-06-05 13:45:47,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265912809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:47,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459596120] [2021-06-05 13:45:47,324 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 13:45:47,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:47,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:47,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:47,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:47,430 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 13:45:47,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459596120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:47,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:47,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:45:47,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217771345] [2021-06-05 13:45:47,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:47,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:47,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:47,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:47,431 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 13:45:47,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:47,856 INFO L93 Difference]: Finished difference Result 11456 states and 28845 transitions. [2021-06-05 13:45:47,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:47,856 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 13:45:47,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:47,867 INFO L225 Difference]: With dead ends: 11456 [2021-06-05 13:45:47,867 INFO L226 Difference]: Without dead ends: 11434 [2021-06-05 13:45:47,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:47,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11434 states. [2021-06-05 13:45:47,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11434 to 10210. [2021-06-05 13:45:47,968 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 13:45:47,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10210 states to 10210 states and 26461 transitions. [2021-06-05 13:45:47,983 INFO L78 Accepts]: Start accepts. Automaton has 10210 states and 26461 transitions. Word has length 53 [2021-06-05 13:45:47,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:47,983 INFO L482 AbstractCegarLoop]: Abstraction has 10210 states and 26461 transitions. [2021-06-05 13:45:47,983 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 13:45:47,983 INFO L276 IsEmpty]: Start isEmpty. Operand 10210 states and 26461 transitions. [2021-06-05 13:45:47,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:47,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:47,991 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 13:45:48,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-06-05 13:45:48,191 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:48,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:48,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1198012335, now seen corresponding path program 184 times [2021-06-05 13:45:48,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:48,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824364105] [2021-06-05 13:45:48,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:48,243 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 13:45:48,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:48,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824364105] [2021-06-05 13:45:48,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824364105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:48,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332702296] [2021-06-05 13:45:48,243 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 13:45:48,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:48,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:48,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:48,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:48,345 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 13:45:48,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332702296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:48,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:48,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:45:48,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321976165] [2021-06-05 13:45:48,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:45:48,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:48,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:45:48,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:45:48,346 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 13:45:48,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:48,496 INFO L93 Difference]: Finished difference Result 11989 states and 29653 transitions. [2021-06-05 13:45:48,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:45:48,497 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 13:45:48,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:48,509 INFO L225 Difference]: With dead ends: 11989 [2021-06-05 13:45:48,509 INFO L226 Difference]: Without dead ends: 11986 [2021-06-05 13:45:48,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:48,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11986 states. [2021-06-05 13:45:48,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11986 to 10202. [2021-06-05 13:45:48,660 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 13:45:48,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 26425 transitions. [2021-06-05 13:45:48,678 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 26425 transitions. Word has length 53 [2021-06-05 13:45:48,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:48,679 INFO L482 AbstractCegarLoop]: Abstraction has 10202 states and 26425 transitions. [2021-06-05 13:45:48,679 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 13:45:48,679 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 26425 transitions. [2021-06-05 13:45:48,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:48,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:48,687 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 13:45:48,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:48,888 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:48,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:48,888 INFO L82 PathProgramCache]: Analyzing trace with hash -990949769, now seen corresponding path program 185 times [2021-06-05 13:45:48,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:48,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508337876] [2021-06-05 13:45:48,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:48,960 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 13:45:48,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:48,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508337876] [2021-06-05 13:45:48,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508337876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:48,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237639364] [2021-06-05 13:45:48,960 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 13:45:49,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 13:45:49,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:49,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:49,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:49,113 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 13:45:49,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237639364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:49,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:49,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 13 [2021-06-05 13:45:49,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207465655] [2021-06-05 13:45:49,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:45:49,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:49,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:45:49,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:45:49,115 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 13:45:49,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:49,374 INFO L93 Difference]: Finished difference Result 12152 states and 29947 transitions. [2021-06-05 13:45:49,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:45:49,375 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 13:45:49,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:49,388 INFO L225 Difference]: With dead ends: 12152 [2021-06-05 13:45:49,389 INFO L226 Difference]: Without dead ends: 12134 [2021-06-05 13:45:49,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:49,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12134 states. [2021-06-05 13:45:49,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12134 to 10202. [2021-06-05 13:45:49,511 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 13:45:49,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 26401 transitions. [2021-06-05 13:45:49,529 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 26401 transitions. Word has length 53 [2021-06-05 13:45:49,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:49,529 INFO L482 AbstractCegarLoop]: Abstraction has 10202 states and 26401 transitions. [2021-06-05 13:45:49,529 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 13:45:49,529 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 26401 transitions. [2021-06-05 13:45:49,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:49,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:49,539 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 13:45:49,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-06-05 13:45:49,747 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:49,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:49,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1856017514, now seen corresponding path program 186 times [2021-06-05 13:45:49,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:49,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426016429] [2021-06-05 13:45:49,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:49,824 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 13:45:49,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:49,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426016429] [2021-06-05 13:45:49,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426016429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:49,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652995344] [2021-06-05 13:45:49,825 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 13:45:49,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 13:45:49,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:49,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:49,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:49,947 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 13:45:49,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652995344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:49,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:49,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:45:49,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865512435] [2021-06-05 13:45:49,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:49,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:49,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:49,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:49,948 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 13:45:50,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:50,505 INFO L93 Difference]: Finished difference Result 11006 states and 27812 transitions. [2021-06-05 13:45:50,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:50,505 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 13:45:50,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:50,518 INFO L225 Difference]: With dead ends: 11006 [2021-06-05 13:45:50,518 INFO L226 Difference]: Without dead ends: 10914 [2021-06-05 13:45:50,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:50,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10914 states. [2021-06-05 13:45:50,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10914 to 10195. [2021-06-05 13:45:50,635 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 13:45:50,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10195 states to 10195 states and 26316 transitions. [2021-06-05 13:45:50,650 INFO L78 Accepts]: Start accepts. Automaton has 10195 states and 26316 transitions. Word has length 53 [2021-06-05 13:45:50,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:50,650 INFO L482 AbstractCegarLoop]: Abstraction has 10195 states and 26316 transitions. [2021-06-05 13:45:50,650 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 13:45:50,651 INFO L276 IsEmpty]: Start isEmpty. Operand 10195 states and 26316 transitions. [2021-06-05 13:45:50,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:50,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:50,658 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 13:45:50,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:50,858 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:50,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:50,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1242481334, now seen corresponding path program 187 times [2021-06-05 13:45:50,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:50,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907364944] [2021-06-05 13:45:50,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:50,942 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 13:45:50,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:50,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907364944] [2021-06-05 13:45:50,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907364944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:50,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859785011] [2021-06-05 13:45:50,943 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 13:45:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:50,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:50,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:51,050 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 13:45:51,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859785011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:51,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:51,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:45:51,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426298779] [2021-06-05 13:45:51,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:51,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:51,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:51,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:51,051 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 13:45:51,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:51,502 INFO L93 Difference]: Finished difference Result 11506 states and 28913 transitions. [2021-06-05 13:45:51,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:51,502 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 13:45:51,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:51,514 INFO L225 Difference]: With dead ends: 11506 [2021-06-05 13:45:51,514 INFO L226 Difference]: Without dead ends: 11494 [2021-06-05 13:45:51,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:51,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11494 states. [2021-06-05 13:45:51,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11494 to 10289. [2021-06-05 13:45:51,624 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 13:45:51,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10289 states to 10289 states and 26548 transitions. [2021-06-05 13:45:51,639 INFO L78 Accepts]: Start accepts. Automaton has 10289 states and 26548 transitions. Word has length 53 [2021-06-05 13:45:51,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:51,639 INFO L482 AbstractCegarLoop]: Abstraction has 10289 states and 26548 transitions. [2021-06-05 13:45:51,639 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 13:45:51,639 INFO L276 IsEmpty]: Start isEmpty. Operand 10289 states and 26548 transitions. [2021-06-05 13:45:51,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:51,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:51,646 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 13:45:51,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-06-05 13:45:51,847 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:51,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:51,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1085181847, now seen corresponding path program 89 times [2021-06-05 13:45:51,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:51,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677020481] [2021-06-05 13:45:51,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:51,975 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 13:45:51,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:51,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677020481] [2021-06-05 13:45:51,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677020481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:51,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093521945] [2021-06-05 13:45:51,976 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 13:45:52,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 13:45:52,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:52,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:52,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:52,099 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 13:45:52,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093521945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:52,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:52,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-06-05 13:45:52,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353532747] [2021-06-05 13:45:52,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:45:52,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:52,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:45:52,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:45:52,100 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 13:45:52,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:52,305 INFO L93 Difference]: Finished difference Result 12783 states and 31677 transitions. [2021-06-05 13:45:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:45:52,305 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 13:45:52,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:52,319 INFO L225 Difference]: With dead ends: 12783 [2021-06-05 13:45:52,319 INFO L226 Difference]: Without dead ends: 12763 [2021-06-05 13:45:52,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:45:52,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-06-05 13:45:52,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 10650. [2021-06-05 13:45:52,447 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 13:45:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10650 states to 10650 states and 27520 transitions. [2021-06-05 13:45:52,464 INFO L78 Accepts]: Start accepts. Automaton has 10650 states and 27520 transitions. Word has length 53 [2021-06-05 13:45:52,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:52,464 INFO L482 AbstractCegarLoop]: Abstraction has 10650 states and 27520 transitions. [2021-06-05 13:45:52,464 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 13:45:52,464 INFO L276 IsEmpty]: Start isEmpty. Operand 10650 states and 27520 transitions. [2021-06-05 13:45:52,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:52,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:52,472 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 13:45:52,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-06-05 13:45:52,672 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:52,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:52,673 INFO L82 PathProgramCache]: Analyzing trace with hash -910568628, now seen corresponding path program 188 times [2021-06-05 13:45:52,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:52,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880334250] [2021-06-05 13:45:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:52,754 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 13:45:52,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:52,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880334250] [2021-06-05 13:45:52,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880334250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:52,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321026530] [2021-06-05 13:45:52,754 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 13:45:52,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:52,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:52,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:52,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:52,860 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 13:45:52,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321026530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:52,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:52,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:45:52,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327221027] [2021-06-05 13:45:52,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:52,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:52,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:52,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:52,861 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 13:45:53,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:53,474 INFO L93 Difference]: Finished difference Result 13521 states and 33551 transitions. [2021-06-05 13:45:53,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:45:53,475 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 13:45:53,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:53,491 INFO L225 Difference]: With dead ends: 13521 [2021-06-05 13:45:53,491 INFO L226 Difference]: Without dead ends: 13467 [2021-06-05 13:45:53,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 211.0ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:45:53,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13467 states. [2021-06-05 13:45:53,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13467 to 10945. [2021-06-05 13:45:53,617 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 13:45:53,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10945 states to 10945 states and 28310 transitions. [2021-06-05 13:45:53,632 INFO L78 Accepts]: Start accepts. Automaton has 10945 states and 28310 transitions. Word has length 53 [2021-06-05 13:45:53,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:53,632 INFO L482 AbstractCegarLoop]: Abstraction has 10945 states and 28310 transitions. [2021-06-05 13:45:53,632 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 13:45:53,632 INFO L276 IsEmpty]: Start isEmpty. Operand 10945 states and 28310 transitions. [2021-06-05 13:45:53,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:53,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:53,639 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 13:45:53,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable665,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:53,840 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:53,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:53,840 INFO L82 PathProgramCache]: Analyzing trace with hash 621990481, now seen corresponding path program 189 times [2021-06-05 13:45:53,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:53,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443832809] [2021-06-05 13:45:53,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:53,909 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 13:45:53,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:53,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443832809] [2021-06-05 13:45:53,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443832809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:53,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801901818] [2021-06-05 13:45:53,909 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 13:45:53,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 13:45:53,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:53,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:53,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:54,018 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 13:45:54,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801901818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:54,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:54,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:45:54,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846502274] [2021-06-05 13:45:54,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:54,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:54,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:54,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:54,019 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 13:45:54,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:54,223 INFO L93 Difference]: Finished difference Result 12806 states and 31626 transitions. [2021-06-05 13:45:54,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:45:54,223 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 13:45:54,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:54,237 INFO L225 Difference]: With dead ends: 12806 [2021-06-05 13:45:54,237 INFO L226 Difference]: Without dead ends: 12782 [2021-06-05 13:45:54,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:45:54,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12782 states. [2021-06-05 13:45:54,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12782 to 10945. [2021-06-05 13:45:54,370 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 13:45:54,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10945 states to 10945 states and 28293 transitions. [2021-06-05 13:45:54,386 INFO L78 Accepts]: Start accepts. Automaton has 10945 states and 28293 transitions. Word has length 53 [2021-06-05 13:45:54,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:54,386 INFO L482 AbstractCegarLoop]: Abstraction has 10945 states and 28293 transitions. [2021-06-05 13:45:54,386 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 13:45:54,386 INFO L276 IsEmpty]: Start isEmpty. Operand 10945 states and 28293 transitions. [2021-06-05 13:45:54,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:54,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:54,394 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 13:45:54,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-06-05 13:45:54,594 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:54,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:54,595 INFO L82 PathProgramCache]: Analyzing trace with hash -755732094, now seen corresponding path program 190 times [2021-06-05 13:45:54,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:54,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863150885] [2021-06-05 13:45:54,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:54,693 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 13:45:54,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:54,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863150885] [2021-06-05 13:45:54,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863150885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:54,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523820421] [2021-06-05 13:45:54,694 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 13:45:54,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:54,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:54,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:54,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:54,800 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 13:45:54,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523820421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:54,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:54,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:45:54,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164992503] [2021-06-05 13:45:54,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:45:54,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:54,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:45:54,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:45:54,801 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 13:45:55,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:55,696 INFO L93 Difference]: Finished difference Result 17261 states and 41917 transitions. [2021-06-05 13:45:55,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:45:55,696 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 13:45:55,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:55,715 INFO L225 Difference]: With dead ends: 17261 [2021-06-05 13:45:55,715 INFO L226 Difference]: Without dead ends: 17081 [2021-06-05 13:45:55,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 423.2ms TimeCoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 13:45:55,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17081 states. [2021-06-05 13:45:55,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17081 to 11484. [2021-06-05 13:45:55,867 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 13:45:55,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 29700 transitions. [2021-06-05 13:45:55,885 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 29700 transitions. Word has length 53 [2021-06-05 13:45:55,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:55,885 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 29700 transitions. [2021-06-05 13:45:55,885 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 13:45:55,885 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 29700 transitions. [2021-06-05 13:45:55,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:55,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:55,893 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 13:45:56,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:56,094 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:56,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:56,094 INFO L82 PathProgramCache]: Analyzing trace with hash -369129417, now seen corresponding path program 191 times [2021-06-05 13:45:56,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:56,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249409118] [2021-06-05 13:45:56,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:56,171 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 13:45:56,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:56,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249409118] [2021-06-05 13:45:56,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249409118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:56,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316818641] [2021-06-05 13:45:56,172 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 13:45:56,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 13:45:56,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:56,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:56,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:56,298 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 13:45:56,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316818641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:56,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:56,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-06-05 13:45:56,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710716562] [2021-06-05 13:45:56,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:56,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:56,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:56,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:56,299 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 13:45:56,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:56,568 INFO L93 Difference]: Finished difference Result 13565 states and 33450 transitions. [2021-06-05 13:45:56,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:45:56,568 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 13:45:56,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:56,583 INFO L225 Difference]: With dead ends: 13565 [2021-06-05 13:45:56,583 INFO L226 Difference]: Without dead ends: 13532 [2021-06-05 13:45:56,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:56,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13532 states. [2021-06-05 13:45:56,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13532 to 11484. [2021-06-05 13:45:56,720 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 13:45:56,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 29691 transitions. [2021-06-05 13:45:56,738 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 29691 transitions. Word has length 53 [2021-06-05 13:45:56,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:56,738 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 29691 transitions. [2021-06-05 13:45:56,738 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 13:45:56,738 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 29691 transitions. [2021-06-05 13:45:56,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:56,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:56,747 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 13:45:56,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,331 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:56,947 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:56,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:56,948 INFO L82 PathProgramCache]: Analyzing trace with hash -815423604, now seen corresponding path program 192 times [2021-06-05 13:45:56,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:56,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004210209] [2021-06-05 13:45:56,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:57,052 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 13:45:57,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:57,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004210209] [2021-06-05 13:45:57,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004210209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:57,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475763967] [2021-06-05 13:45:57,052 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 13:45:57,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 13:45:57,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:57,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:57,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:57,163 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 13:45:57,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475763967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:57,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:57,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:45:57,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210079688] [2021-06-05 13:45:57,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:45:57,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:57,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:45:57,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:45:57,164 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 13:45:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:58,472 INFO L93 Difference]: Finished difference Result 21447 states and 51505 transitions. [2021-06-05 13:45:58,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 13:45:58,472 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 13:45:58,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:58,497 INFO L225 Difference]: With dead ends: 21447 [2021-06-05 13:45:58,497 INFO L226 Difference]: Without dead ends: 21171 [2021-06-05 13:45:58,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 709.0ms TimeCoverageRelationStatistics Valid=495, Invalid=3927, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 13:45:58,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21171 states. [2021-06-05 13:45:58,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21171 to 11987. [2021-06-05 13:45:58,718 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 13:45:58,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11987 states to 11987 states and 31007 transitions. [2021-06-05 13:45:58,738 INFO L78 Accepts]: Start accepts. Automaton has 11987 states and 31007 transitions. Word has length 53 [2021-06-05 13:45:58,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:58,738 INFO L482 AbstractCegarLoop]: Abstraction has 11987 states and 31007 transitions. [2021-06-05 13:45:58,738 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 13:45:58,738 INFO L276 IsEmpty]: Start isEmpty. Operand 11987 states and 31007 transitions. [2021-06-05 13:45:58,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:58,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:58,746 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 13:45:58,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:58,947 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:58,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:58,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1078149265, now seen corresponding path program 193 times [2021-06-05 13:45:58,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:58,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131325836] [2021-06-05 13:45:58,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:59,037 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 13:45:59,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:59,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131325836] [2021-06-05 13:45:59,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131325836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:59,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999861865] [2021-06-05 13:45:59,037 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 13:45:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:59,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:45:59,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:59,144 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 13:45:59,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999861865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:59,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:59,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 13:45:59,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640808158] [2021-06-05 13:45:59,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:45:59,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:59,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:45:59,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:45:59,145 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 13:45:59,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:59,409 INFO L93 Difference]: Finished difference Result 14020 states and 34646 transitions. [2021-06-05 13:45:59,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:45:59,409 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 13:45:59,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:59,425 INFO L225 Difference]: With dead ends: 14020 [2021-06-05 13:45:59,425 INFO L226 Difference]: Without dead ends: 13978 [2021-06-05 13:45:59,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:59,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13978 states. [2021-06-05 13:45:59,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13978 to 11653. [2021-06-05 13:45:59,563 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 13:45:59,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11653 states to 11653 states and 30074 transitions. [2021-06-05 13:45:59,580 INFO L78 Accepts]: Start accepts. Automaton has 11653 states and 30074 transitions. Word has length 53 [2021-06-05 13:45:59,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:59,580 INFO L482 AbstractCegarLoop]: Abstraction has 11653 states and 30074 transitions. [2021-06-05 13:45:59,580 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 13:45:59,580 INFO L276 IsEmpty]: Start isEmpty. Operand 11653 states and 30074 transitions. [2021-06-05 13:45:59,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:45:59,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:59,588 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 13:45:59,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-06-05 13:45:59,788 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:59,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:59,788 INFO L82 PathProgramCache]: Analyzing trace with hash -968737470, now seen corresponding path program 194 times [2021-06-05 13:45:59,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:59,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765812360] [2021-06-05 13:45:59,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:59,901 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 13:45:59,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:59,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765812360] [2021-06-05 13:45:59,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765812360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:59,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388059733] [2021-06-05 13:45:59,902 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 13:45:59,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:59,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:59,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:45:59,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:00,006 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 13:46:00,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388059733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:00,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:00,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:46:00,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428083174] [2021-06-05 13:46:00,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:46:00,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:00,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:46:00,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:46:00,007 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 13:46:00,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:00,697 INFO L93 Difference]: Finished difference Result 16353 states and 39527 transitions. [2021-06-05 13:46:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:46:00,697 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 13:46:00,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:00,714 INFO L225 Difference]: With dead ends: 16353 [2021-06-05 13:46:00,714 INFO L226 Difference]: Without dead ends: 15975 [2021-06-05 13:46:00,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 283.7ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:46:00,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15975 states. [2021-06-05 13:46:00,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15975 to 10369. [2021-06-05 13:46:00,862 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 13:46:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10369 states to 10369 states and 26632 transitions. [2021-06-05 13:46:00,878 INFO L78 Accepts]: Start accepts. Automaton has 10369 states and 26632 transitions. Word has length 53 [2021-06-05 13:46:00,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:00,878 INFO L482 AbstractCegarLoop]: Abstraction has 10369 states and 26632 transitions. [2021-06-05 13:46:00,878 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 13:46:00,878 INFO L276 IsEmpty]: Start isEmpty. Operand 10369 states and 26632 transitions. [2021-06-05 13:46:00,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:00,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:00,886 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 13:46:01,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable683,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:01,086 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:01,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:01,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1828679397, now seen corresponding path program 90 times [2021-06-05 13:46:01,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:01,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812908911] [2021-06-05 13:46:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:01,153 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 13:46:01,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:01,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812908911] [2021-06-05 13:46:01,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812908911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:01,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348100628] [2021-06-05 13:46:01,153 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 13:46:01,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 13:46:01,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:01,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:01,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:01,269 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 13:46:01,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348100628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:01,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:01,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 13:46:01,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441585313] [2021-06-05 13:46:01,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:46:01,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:01,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:46:01,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:46:01,270 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 13:46:01,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:01,531 INFO L93 Difference]: Finished difference Result 15824 states and 38717 transitions. [2021-06-05 13:46:01,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:46:01,531 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 13:46:01,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:01,549 INFO L225 Difference]: With dead ends: 15824 [2021-06-05 13:46:01,550 INFO L226 Difference]: Without dead ends: 15824 [2021-06-05 13:46:01,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:46:01,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15824 states. [2021-06-05 13:46:01,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15824 to 10590. [2021-06-05 13:46:01,729 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 13:46:01,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10590 states to 10590 states and 27307 transitions. [2021-06-05 13:46:01,747 INFO L78 Accepts]: Start accepts. Automaton has 10590 states and 27307 transitions. Word has length 53 [2021-06-05 13:46:01,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:01,747 INFO L482 AbstractCegarLoop]: Abstraction has 10590 states and 27307 transitions. [2021-06-05 13:46:01,748 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 13:46:01,748 INFO L276 IsEmpty]: Start isEmpty. Operand 10590 states and 27307 transitions. [2021-06-05 13:46:01,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:01,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:01,757 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 13:46:01,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable684 [2021-06-05 13:46:01,957 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:01,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:01,957 INFO L82 PathProgramCache]: Analyzing trace with hash 828715443, now seen corresponding path program 91 times [2021-06-05 13:46:01,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:01,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552904436] [2021-06-05 13:46:01,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:02,028 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 13:46:02,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:02,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552904436] [2021-06-05 13:46:02,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552904436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:02,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539751616] [2021-06-05 13:46:02,028 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 13:46:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:02,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:02,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:02,138 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 13:46:02,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539751616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:02,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:02,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 13:46:02,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371585703] [2021-06-05 13:46:02,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:46:02,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:02,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:46:02,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:46:02,139 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 13:46:02,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:02,466 INFO L93 Difference]: Finished difference Result 17337 states and 42262 transitions. [2021-06-05 13:46:02,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:46:02,467 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 13:46:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:02,487 INFO L225 Difference]: With dead ends: 17337 [2021-06-05 13:46:02,487 INFO L226 Difference]: Without dead ends: 17337 [2021-06-05 13:46:02,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:02,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17337 states. [2021-06-05 13:46:02,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17337 to 10630. [2021-06-05 13:46:02,645 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 13:46:02,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10630 states to 10630 states and 27426 transitions. [2021-06-05 13:46:02,662 INFO L78 Accepts]: Start accepts. Automaton has 10630 states and 27426 transitions. Word has length 53 [2021-06-05 13:46:02,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:02,662 INFO L482 AbstractCegarLoop]: Abstraction has 10630 states and 27426 transitions. [2021-06-05 13:46:02,662 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 13:46:02,662 INFO L276 IsEmpty]: Start isEmpty. Operand 10630 states and 27426 transitions. [2021-06-05 13:46:02,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:02,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:02,670 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 13:46:02,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable685,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:02,870 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:02,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:02,870 INFO L82 PathProgramCache]: Analyzing trace with hash -861279721, now seen corresponding path program 92 times [2021-06-05 13:46:02,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:02,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280142450] [2021-06-05 13:46:02,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:02,951 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 13:46:02,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:02,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280142450] [2021-06-05 13:46:02,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280142450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:02,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363083261] [2021-06-05 13:46:02,951 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 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 13:46:02,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:02,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:02,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:02,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:03,064 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 13:46:03,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363083261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:03,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:03,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:46:03,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573170322] [2021-06-05 13:46:03,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:03,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:03,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:03,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:03,065 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 13:46:03,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:03,443 INFO L93 Difference]: Finished difference Result 17209 states and 41987 transitions. [2021-06-05 13:46:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:46:03,443 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 13:46:03,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:03,464 INFO L225 Difference]: With dead ends: 17209 [2021-06-05 13:46:03,464 INFO L226 Difference]: Without dead ends: 17209 [2021-06-05 13:46:03,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=233, Invalid=367, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:46:03,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17209 states. [2021-06-05 13:46:03,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17209 to 10659. [2021-06-05 13:46:03,623 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 13:46:03,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10659 states to 10659 states and 27514 transitions. [2021-06-05 13:46:03,640 INFO L78 Accepts]: Start accepts. Automaton has 10659 states and 27514 transitions. Word has length 53 [2021-06-05 13:46:03,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:03,640 INFO L482 AbstractCegarLoop]: Abstraction has 10659 states and 27514 transitions. [2021-06-05 13:46:03,640 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 13:46:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 10659 states and 27514 transitions. [2021-06-05 13:46:03,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:03,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:03,648 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 13:46:03,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2021-06-05 13:46:03,848 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:03,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:03,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1900566733, now seen corresponding path program 93 times [2021-06-05 13:46:03,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:03,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571701733] [2021-06-05 13:46:03,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:03,941 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 13:46:03,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:03,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571701733] [2021-06-05 13:46:03,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571701733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:03,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591995933] [2021-06-05 13:46:03,941 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 13:46:03,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 13:46:03,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:03,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:46:03,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:04,119 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 13:46:04,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591995933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:04,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:04,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-06-05 13:46:04,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146350041] [2021-06-05 13:46:04,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:04,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:04,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:04,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:04,120 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 13:46:04,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:04,573 INFO L93 Difference]: Finished difference Result 12656 states and 31353 transitions. [2021-06-05 13:46:04,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:46:04,573 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 13:46:04,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:04,587 INFO L225 Difference]: With dead ends: 12656 [2021-06-05 13:46:04,588 INFO L226 Difference]: Without dead ends: 12656 [2021-06-05 13:46:04,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:46:04,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12656 states. [2021-06-05 13:46:04,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12656 to 10205. [2021-06-05 13:46:04,745 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 13:46:04,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10205 states to 10205 states and 26277 transitions. [2021-06-05 13:46:04,762 INFO L78 Accepts]: Start accepts. Automaton has 10205 states and 26277 transitions. Word has length 53 [2021-06-05 13:46:04,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:04,762 INFO L482 AbstractCegarLoop]: Abstraction has 10205 states and 26277 transitions. [2021-06-05 13:46:04,762 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 13:46:04,762 INFO L276 IsEmpty]: Start isEmpty. Operand 10205 states and 26277 transitions. [2021-06-05 13:46:04,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:04,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:04,771 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 13:46:04,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-06-05 13:46:04,971 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:04,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:04,972 INFO L82 PathProgramCache]: Analyzing trace with hash -219319817, now seen corresponding path program 195 times [2021-06-05 13:46:04,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:04,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172021667] [2021-06-05 13:46:04,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:05,070 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 13:46:05,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:05,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172021667] [2021-06-05 13:46:05,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172021667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:05,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786588870] [2021-06-05 13:46:05,071 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 13:46:05,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:46:05,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:05,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:05,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:05,181 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 13:46:05,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786588870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:05,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:05,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 13:46:05,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125125522] [2021-06-05 13:46:05,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:46:05,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:05,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:46:05,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:46:05,182 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 13:46:05,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:05,457 INFO L93 Difference]: Finished difference Result 11763 states and 29051 transitions. [2021-06-05 13:46:05,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:46:05,457 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 13:46:05,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:05,470 INFO L225 Difference]: With dead ends: 11763 [2021-06-05 13:46:05,470 INFO L226 Difference]: Without dead ends: 11718 [2021-06-05 13:46:05,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 142.6ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:05,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11718 states. [2021-06-05 13:46:05,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11718 to 10205. [2021-06-05 13:46:05,593 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 13:46:05,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10205 states to 10205 states and 26268 transitions. [2021-06-05 13:46:05,610 INFO L78 Accepts]: Start accepts. Automaton has 10205 states and 26268 transitions. Word has length 53 [2021-06-05 13:46:05,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:05,610 INFO L482 AbstractCegarLoop]: Abstraction has 10205 states and 26268 transitions. [2021-06-05 13:46:05,610 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 13:46:05,610 INFO L276 IsEmpty]: Start isEmpty. Operand 10205 states and 26268 transitions. [2021-06-05 13:46:05,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:05,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:05,618 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 13:46:05,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:05,818 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:05,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:05,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1122147283, now seen corresponding path program 196 times [2021-06-05 13:46:05,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:05,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241677243] [2021-06-05 13:46:05,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:05,873 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 13:46:05,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:05,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241677243] [2021-06-05 13:46:05,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241677243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:05,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614740743] [2021-06-05 13:46:05,874 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 13:46:05,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:05,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:05,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:05,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:05,981 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 13:46:05,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614740743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:05,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:05,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:46:05,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259627395] [2021-06-05 13:46:05,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:46:05,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:05,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:46:05,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:46:05,982 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 13:46:06,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:06,148 INFO L93 Difference]: Finished difference Result 12506 states and 30816 transitions. [2021-06-05 13:46:06,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:46:06,149 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 13:46:06,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:06,166 INFO L225 Difference]: With dead ends: 12506 [2021-06-05 13:46:06,166 INFO L226 Difference]: Without dead ends: 12506 [2021-06-05 13:46:06,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:46:06,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12506 states. [2021-06-05 13:46:06,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12506 to 10409. [2021-06-05 13:46:06,298 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 13:46:06,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10409 states to 10409 states and 26914 transitions. [2021-06-05 13:46:06,314 INFO L78 Accepts]: Start accepts. Automaton has 10409 states and 26914 transitions. Word has length 53 [2021-06-05 13:46:06,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:06,315 INFO L482 AbstractCegarLoop]: Abstraction has 10409 states and 26914 transitions. [2021-06-05 13:46:06,315 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 13:46:06,315 INFO L276 IsEmpty]: Start isEmpty. Operand 10409 states and 26914 transitions. [2021-06-05 13:46:06,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:06,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:06,322 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 13:46:06,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-06-05 13:46:06,523 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:06,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:06,523 INFO L82 PathProgramCache]: Analyzing trace with hash 884085766, now seen corresponding path program 94 times [2021-06-05 13:46:06,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:06,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084851594] [2021-06-05 13:46:06,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:06,607 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 13:46:06,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:06,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084851594] [2021-06-05 13:46:06,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084851594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:06,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771807124] [2021-06-05 13:46:06,608 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 13:46:06,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:06,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:06,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:06,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:06,715 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 13:46:06,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771807124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:06,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:06,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:46:06,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389954927] [2021-06-05 13:46:06,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:46:06,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:06,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:46:06,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:46:06,716 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 13:46:07,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:07,159 INFO L93 Difference]: Finished difference Result 11786 states and 29613 transitions. [2021-06-05 13:46:07,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:46:07,159 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 13:46:07,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:07,173 INFO L225 Difference]: With dead ends: 11786 [2021-06-05 13:46:07,173 INFO L226 Difference]: Without dead ends: 11771 [2021-06-05 13:46:07,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:46:07,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11771 states. [2021-06-05 13:46:07,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11771 to 10612. [2021-06-05 13:46:07,291 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 13:46:07,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10612 states to 10612 states and 27395 transitions. [2021-06-05 13:46:07,306 INFO L78 Accepts]: Start accepts. Automaton has 10612 states and 27395 transitions. Word has length 53 [2021-06-05 13:46:07,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:07,307 INFO L482 AbstractCegarLoop]: Abstraction has 10612 states and 27395 transitions. [2021-06-05 13:46:07,307 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 13:46:07,307 INFO L276 IsEmpty]: Start isEmpty. Operand 10612 states and 27395 transitions. [2021-06-05 13:46:07,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:07,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:07,314 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 13:46:07,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-06-05 13:46:07,514 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:07,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:07,515 INFO L82 PathProgramCache]: Analyzing trace with hash -669611091, now seen corresponding path program 197 times [2021-06-05 13:46:07,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:07,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512850335] [2021-06-05 13:46:07,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:07,569 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 13:46:07,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:07,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512850335] [2021-06-05 13:46:07,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512850335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:07,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901784176] [2021-06-05 13:46:07,569 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 13:46:07,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 13:46:07,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:07,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:07,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:07,691 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 13:46:07,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901784176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:07,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:07,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 12 [2021-06-05 13:46:07,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201127696] [2021-06-05 13:46:07,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:46:07,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:07,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:46:07,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:46:07,691 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 13:46:07,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:07,855 INFO L93 Difference]: Finished difference Result 12612 states and 31047 transitions. [2021-06-05 13:46:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:46:07,855 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 13:46:07,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:07,909 INFO L225 Difference]: With dead ends: 12612 [2021-06-05 13:46:07,909 INFO L226 Difference]: Without dead ends: 12609 [2021-06-05 13:46:07,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12609 states. [2021-06-05 13:46:08,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12609 to 10610. [2021-06-05 13:46:08,018 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 13:46:08,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10610 states to 10610 states and 27383 transitions. [2021-06-05 13:46:08,034 INFO L78 Accepts]: Start accepts. Automaton has 10610 states and 27383 transitions. Word has length 53 [2021-06-05 13:46:08,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:08,034 INFO L482 AbstractCegarLoop]: Abstraction has 10610 states and 27383 transitions. [2021-06-05 13:46:08,034 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 13:46:08,034 INFO L276 IsEmpty]: Start isEmpty. Operand 10610 states and 27383 transitions. [2021-06-05 13:46:08,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:08,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:08,042 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 13:46:08,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable699,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:08,242 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:08,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:08,243 INFO L82 PathProgramCache]: Analyzing trace with hash -462548525, now seen corresponding path program 198 times [2021-06-05 13:46:08,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:08,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973894343] [2021-06-05 13:46:08,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:08,308 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 13:46:08,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:08,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973894343] [2021-06-05 13:46:08,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973894343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:08,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599274422] [2021-06-05 13:46:08,308 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 13:46:08,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 13:46:08,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:08,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:08,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:08,415 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 13:46:08,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599274422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:08,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:08,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 13:46:08,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167625524] [2021-06-05 13:46:08,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:46:08,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:08,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:46:08,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:46:08,416 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 13:46:08,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:08,584 INFO L93 Difference]: Finished difference Result 12493 states and 30763 transitions. [2021-06-05 13:46:08,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:46:08,584 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 13:46:08,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:08,599 INFO L225 Difference]: With dead ends: 12493 [2021-06-05 13:46:08,599 INFO L226 Difference]: Without dead ends: 12475 [2021-06-05 13:46:08,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:08,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12475 states. [2021-06-05 13:46:08,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12475 to 10610. [2021-06-05 13:46:08,728 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 13:46:08,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10610 states to 10610 states and 27360 transitions. [2021-06-05 13:46:08,744 INFO L78 Accepts]: Start accepts. Automaton has 10610 states and 27360 transitions. Word has length 53 [2021-06-05 13:46:08,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:08,744 INFO L482 AbstractCegarLoop]: Abstraction has 10610 states and 27360 transitions. [2021-06-05 13:46:08,744 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 13:46:08,744 INFO L276 IsEmpty]: Start isEmpty. Operand 10610 states and 27360 transitions. [2021-06-05 13:46:08,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:08,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:08,752 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 13:46:08,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-06-05 13:46:08,952 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:08,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:08,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1910548538, now seen corresponding path program 199 times [2021-06-05 13:46:08,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:08,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054624084] [2021-06-05 13:46:08,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:09,030 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 13:46:09,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:09,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054624084] [2021-06-05 13:46:09,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054624084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:09,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026389923] [2021-06-05 13:46:09,030 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 13:46:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:09,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:09,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:09,149 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 13:46:09,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026389923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:09,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:09,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:46:09,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041962975] [2021-06-05 13:46:09,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:46:09,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:09,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:46:09,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:46:09,150 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 13:46:09,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:09,767 INFO L93 Difference]: Finished difference Result 11446 states and 28816 transitions. [2021-06-05 13:46:09,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:46:09,768 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 13:46:09,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:09,781 INFO L225 Difference]: With dead ends: 11446 [2021-06-05 13:46:09,781 INFO L226 Difference]: Without dead ends: 11336 [2021-06-05 13:46:09,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:46:09,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11336 states. [2021-06-05 13:46:09,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11336 to 10627. [2021-06-05 13:46:09,907 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 13:46:09,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10627 states to 10627 states and 27306 transitions. [2021-06-05 13:46:09,923 INFO L78 Accepts]: Start accepts. Automaton has 10627 states and 27306 transitions. Word has length 53 [2021-06-05 13:46:09,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:09,923 INFO L482 AbstractCegarLoop]: Abstraction has 10627 states and 27306 transitions. [2021-06-05 13:46:09,924 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 13:46:09,924 INFO L276 IsEmpty]: Start isEmpty. Operand 10627 states and 27306 transitions. [2021-06-05 13:46:09,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:09,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:09,932 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 13:46:10,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable704,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:10,133 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:10,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:10,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1770882578, now seen corresponding path program 200 times [2021-06-05 13:46:10,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:10,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378348880] [2021-06-05 13:46:10,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:10,216 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 13:46:10,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:10,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378348880] [2021-06-05 13:46:10,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378348880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:10,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330910505] [2021-06-05 13:46:10,216 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 13:46:10,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:10,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:10,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:10,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:10,322 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 13:46:10,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330910505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:10,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:10,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:46:10,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207422788] [2021-06-05 13:46:10,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:46:10,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:10,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:46:10,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:46:10,323 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 13:46:10,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:10,775 INFO L93 Difference]: Finished difference Result 11964 states and 29958 transitions. [2021-06-05 13:46:10,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:46:10,776 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 13:46:10,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:10,788 INFO L225 Difference]: With dead ends: 11964 [2021-06-05 13:46:10,789 INFO L226 Difference]: Without dead ends: 11952 [2021-06-05 13:46:10,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:46:10,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11952 states. [2021-06-05 13:46:10,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11952 to 10745. [2021-06-05 13:46:10,950 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 13:46:10,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10745 states to 10745 states and 27602 transitions. [2021-06-05 13:46:10,966 INFO L78 Accepts]: Start accepts. Automaton has 10745 states and 27602 transitions. Word has length 53 [2021-06-05 13:46:10,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:10,966 INFO L482 AbstractCegarLoop]: Abstraction has 10745 states and 27602 transitions. [2021-06-05 13:46:10,966 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 13:46:10,966 INFO L276 IsEmpty]: Start isEmpty. Operand 10745 states and 27602 transitions. [2021-06-05 13:46:10,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:10,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:10,974 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 13:46:11,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable705 [2021-06-05 13:46:11,174 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:11,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:11,174 INFO L82 PathProgramCache]: Analyzing trace with hash -382167384, now seen corresponding path program 201 times [2021-06-05 13:46:11,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:11,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421604950] [2021-06-05 13:46:11,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:11,272 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 13:46:11,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:11,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421604950] [2021-06-05 13:46:11,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421604950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:11,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10148509] [2021-06-05 13:46:11,272 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 13:46:11,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 13:46:11,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:11,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:11,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:11,407 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 13:46:11,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10148509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:11,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:11,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:46:11,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995262046] [2021-06-05 13:46:11,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:46:11,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:11,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:46:11,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:46:11,407 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 13:46:12,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:12,099 INFO L93 Difference]: Finished difference Result 13743 states and 33934 transitions. [2021-06-05 13:46:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:46:12,099 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 13:46:12,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:12,114 INFO L225 Difference]: With dead ends: 13743 [2021-06-05 13:46:12,115 INFO L226 Difference]: Without dead ends: 13689 [2021-06-05 13:46:12,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 244.8ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:46:12,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13689 states. [2021-06-05 13:46:12,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13689 to 11094. [2021-06-05 13:46:12,252 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 13:46:12,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11094 states to 11094 states and 28546 transitions. [2021-06-05 13:46:12,267 INFO L78 Accepts]: Start accepts. Automaton has 11094 states and 28546 transitions. Word has length 53 [2021-06-05 13:46:12,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:12,267 INFO L482 AbstractCegarLoop]: Abstraction has 11094 states and 28546 transitions. [2021-06-05 13:46:12,267 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 13:46:12,267 INFO L276 IsEmpty]: Start isEmpty. Operand 11094 states and 28546 transitions. [2021-06-05 13:46:12,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:12,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:12,274 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 13:46:12,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:12,475 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:12,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:12,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1150391725, now seen corresponding path program 202 times [2021-06-05 13:46:12,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:12,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720657600] [2021-06-05 13:46:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:12,546 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 13:46:12,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:12,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720657600] [2021-06-05 13:46:12,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720657600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:12,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446580326] [2021-06-05 13:46:12,546 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 13:46:12,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:12,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:12,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:12,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:12,651 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 13:46:12,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446580326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:12,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:12,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:46:12,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799622130] [2021-06-05 13:46:12,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:46:12,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:12,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:46:12,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:46:12,651 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 13:46:12,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:12,828 INFO L93 Difference]: Finished difference Result 13092 states and 32135 transitions. [2021-06-05 13:46:12,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:46:12,828 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 13:46:12,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:12,841 INFO L225 Difference]: With dead ends: 13092 [2021-06-05 13:46:12,842 INFO L226 Difference]: Without dead ends: 13068 [2021-06-05 13:46:12,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:46:12,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13068 states. [2021-06-05 13:46:12,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13068 to 11094. [2021-06-05 13:46:12,968 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 13:46:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11094 states to 11094 states and 28529 transitions. [2021-06-05 13:46:12,985 INFO L78 Accepts]: Start accepts. Automaton has 11094 states and 28529 transitions. Word has length 53 [2021-06-05 13:46:12,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:12,985 INFO L482 AbstractCegarLoop]: Abstraction has 11094 states and 28529 transitions. [2021-06-05 13:46:12,985 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 13:46:12,985 INFO L276 IsEmpty]: Start isEmpty. Operand 11094 states and 28529 transitions. [2021-06-05 13:46:12,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:12,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:12,993 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 13:46:13,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:13,193 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:13,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:13,194 INFO L82 PathProgramCache]: Analyzing trace with hash -227330850, now seen corresponding path program 203 times [2021-06-05 13:46:13,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:13,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31969121] [2021-06-05 13:46:13,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:13,283 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 13:46:13,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:13,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31969121] [2021-06-05 13:46:13,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31969121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:13,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493175913] [2021-06-05 13:46:13,283 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 13:46:13,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 13:46:13,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:13,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:13,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:13,391 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 13:46:13,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493175913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:13,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:13,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:46:13,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53668749] [2021-06-05 13:46:13,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:46:13,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:13,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:46:13,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:46:13,392 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 13:46:14,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:14,426 INFO L93 Difference]: Finished difference Result 17716 states and 42908 transitions. [2021-06-05 13:46:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 13:46:14,427 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 13:46:14,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:14,446 INFO L225 Difference]: With dead ends: 17716 [2021-06-05 13:46:14,446 INFO L226 Difference]: Without dead ends: 17548 [2021-06-05 13:46:14,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 452.0ms TimeCoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 13:46:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17548 states. [2021-06-05 13:46:14,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17548 to 11789. [2021-06-05 13:46:14,629 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 13:46:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11789 states to 11789 states and 30351 transitions. [2021-06-05 13:46:14,647 INFO L78 Accepts]: Start accepts. Automaton has 11789 states and 30351 transitions. Word has length 53 [2021-06-05 13:46:14,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:14,647 INFO L482 AbstractCegarLoop]: Abstraction has 11789 states and 30351 transitions. [2021-06-05 13:46:14,647 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 13:46:14,647 INFO L276 IsEmpty]: Start isEmpty. Operand 11789 states and 30351 transitions. [2021-06-05 13:46:14,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:14,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:14,655 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 13:46:14,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:14,855 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:14,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:14,856 INFO L82 PathProgramCache]: Analyzing trace with hash 159271827, now seen corresponding path program 204 times [2021-06-05 13:46:14,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:14,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333769016] [2021-06-05 13:46:14,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:14,937 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 13:46:14,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:14,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333769016] [2021-06-05 13:46:14,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333769016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:14,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380973070] [2021-06-05 13:46:14,937 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 13:46:14,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 13:46:14,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:14,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:14,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:15,047 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 13:46:15,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380973070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:15,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:15,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:46:15,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935040937] [2021-06-05 13:46:15,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:46:15,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:15,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:46:15,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:46:15,048 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 13:46:15,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:15,256 INFO L93 Difference]: Finished difference Result 13934 states and 34216 transitions. [2021-06-05 13:46:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:46:15,257 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 13:46:15,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:15,270 INFO L225 Difference]: With dead ends: 13934 [2021-06-05 13:46:15,270 INFO L226 Difference]: Without dead ends: 13901 [2021-06-05 13:46:15,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:46:15,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13901 states. [2021-06-05 13:46:15,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13901 to 11789. [2021-06-05 13:46:15,398 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 13:46:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11789 states to 11789 states and 30342 transitions. [2021-06-05 13:46:15,417 INFO L78 Accepts]: Start accepts. Automaton has 11789 states and 30342 transitions. Word has length 53 [2021-06-05 13:46:15,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:15,417 INFO L482 AbstractCegarLoop]: Abstraction has 11789 states and 30342 transitions. [2021-06-05 13:46:15,417 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 13:46:15,417 INFO L276 IsEmpty]: Start isEmpty. Operand 11789 states and 30342 transitions. [2021-06-05 13:46:15,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:15,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:15,425 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 13:46:15,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable712,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:15,626 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:15,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:15,626 INFO L82 PathProgramCache]: Analyzing trace with hash -287022360, now seen corresponding path program 205 times [2021-06-05 13:46:15,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:15,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46918299] [2021-06-05 13:46:15,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:15,726 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 13:46:15,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:15,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46918299] [2021-06-05 13:46:15,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46918299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:15,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548301064] [2021-06-05 13:46:15,727 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 13:46:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:15,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:15,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:15,830 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 13:46:15,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548301064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:15,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:15,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:46:15,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892399579] [2021-06-05 13:46:15,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:15,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:15,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:15,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:15,831 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 13:46:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:17,352 INFO L93 Difference]: Finished difference Result 26526 states and 62830 transitions. [2021-06-05 13:46:17,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 13:46:17,352 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 13:46:17,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:17,383 INFO L225 Difference]: With dead ends: 26526 [2021-06-05 13:46:17,384 INFO L226 Difference]: Without dead ends: 26004 [2021-06-05 13:46:17,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 880.6ms TimeCoverageRelationStatistics Valid=651, Invalid=5829, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 13:46:17,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26004 states. [2021-06-05 13:46:17,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26004 to 12945. [2021-06-05 13:46:17,654 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 13:46:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 33335 transitions. [2021-06-05 13:46:17,674 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 33335 transitions. Word has length 53 [2021-06-05 13:46:17,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:17,674 INFO L482 AbstractCegarLoop]: Abstraction has 12945 states and 33335 transitions. [2021-06-05 13:46:17,674 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 13:46:17,674 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 33335 transitions. [2021-06-05 13:46:17,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:17,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:17,682 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 13:46:17,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,350 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:17,883 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:17,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:17,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1606550509, now seen corresponding path program 206 times [2021-06-05 13:46:17,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:17,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438093536] [2021-06-05 13:46:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:17,974 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 13:46:17,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:17,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438093536] [2021-06-05 13:46:17,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438093536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:17,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910220900] [2021-06-05 13:46:17,975 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 13:46:18,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:18,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:18,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:18,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:18,085 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 13:46:18,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910220900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:18,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:18,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 13:46:18,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998278813] [2021-06-05 13:46:18,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:18,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:18,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:18,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:18,086 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 13:46:18,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:18,359 INFO L93 Difference]: Finished difference Result 15322 states and 37639 transitions. [2021-06-05 13:46:18,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:46:18,359 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 13:46:18,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:18,375 INFO L225 Difference]: With dead ends: 15322 [2021-06-05 13:46:18,375 INFO L226 Difference]: Without dead ends: 15280 [2021-06-05 13:46:18,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:18,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15280 states. [2021-06-05 13:46:18,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15280 to 12945. [2021-06-05 13:46:18,541 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 13:46:18,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 33326 transitions. [2021-06-05 13:46:18,561 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 33326 transitions. Word has length 53 [2021-06-05 13:46:18,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:18,561 INFO L482 AbstractCegarLoop]: Abstraction has 12945 states and 33326 transitions. [2021-06-05 13:46:18,561 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 13:46:18,561 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 33326 transitions. [2021-06-05 13:46:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:18,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:18,569 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 13:46:18,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:18,769 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:18,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:18,769 INFO L82 PathProgramCache]: Analyzing trace with hash -440336226, now seen corresponding path program 207 times [2021-06-05 13:46:18,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:18,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050291631] [2021-06-05 13:46:18,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:18,882 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 13:46:18,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:18,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050291631] [2021-06-05 13:46:18,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050291631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:18,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728801717] [2021-06-05 13:46:18,882 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 13:46:18,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 13:46:18,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:18,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:18,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:18,991 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 13:46:18,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728801717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:18,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:18,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:46:18,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575459963] [2021-06-05 13:46:18,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:46:18,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:18,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:46:18,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:46:18,992 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 13:46:21,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:21,367 INFO L93 Difference]: Finished difference Result 33896 states and 80215 transitions. [2021-06-05 13:46:21,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-06-05 13:46:21,367 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 13:46:21,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:21,403 INFO L225 Difference]: With dead ends: 33896 [2021-06-05 13:46:21,404 INFO L226 Difference]: Without dead ends: 33278 [2021-06-05 13:46:21,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6564 ImplicationChecksByTransitivity, 1671.5ms TimeCoverageRelationStatistics Valid=1461, Invalid=15051, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 13:46:21,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33278 states. [2021-06-05 13:46:21,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33278 to 13864. [2021-06-05 13:46:21,681 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 13:46:21,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13864 states to 13864 states and 35696 transitions. [2021-06-05 13:46:21,703 INFO L78 Accepts]: Start accepts. Automaton has 13864 states and 35696 transitions. Word has length 53 [2021-06-05 13:46:21,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:21,704 INFO L482 AbstractCegarLoop]: Abstraction has 13864 states and 35696 transitions. [2021-06-05 13:46:21,704 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 13:46:21,704 INFO L276 IsEmpty]: Start isEmpty. Operand 13864 states and 35696 transitions. [2021-06-05 13:46:21,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:21,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:21,713 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 13:46:21,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:21,913 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:21,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:21,913 INFO L82 PathProgramCache]: Analyzing trace with hash 309081427, now seen corresponding path program 208 times [2021-06-05 13:46:21,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:21,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013775427] [2021-06-05 13:46:21,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:22,017 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 13:46:22,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:22,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013775427] [2021-06-05 13:46:22,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013775427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:22,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278036954] [2021-06-05 13:46:22,017 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 13:46:22,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:22,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:22,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:22,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:22,127 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 13:46:22,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278036954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:22,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:22,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 13:46:22,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465306768] [2021-06-05 13:46:22,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:46:22,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:22,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:46:22,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:46:22,128 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 13:46:22,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:22,393 INFO L93 Difference]: Finished difference Result 16347 states and 40212 transitions. [2021-06-05 13:46:22,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:46:22,393 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 13:46:22,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:22,411 INFO L225 Difference]: With dead ends: 16347 [2021-06-05 13:46:22,412 INFO L226 Difference]: Without dead ends: 16296 [2021-06-05 13:46:22,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:22,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16296 states. [2021-06-05 13:46:22,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16296 to 13554. [2021-06-05 13:46:22,578 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 13:46:22,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13554 states to 13554 states and 34836 transitions. [2021-06-05 13:46:22,599 INFO L78 Accepts]: Start accepts. Automaton has 13554 states and 34836 transitions. Word has length 53 [2021-06-05 13:46:22,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:22,599 INFO L482 AbstractCegarLoop]: Abstraction has 13554 states and 34836 transitions. [2021-06-05 13:46:22,599 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 13:46:22,599 INFO L276 IsEmpty]: Start isEmpty. Operand 13554 states and 34836 transitions. [2021-06-05 13:46:22,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:22,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:22,610 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 13:46:22,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable725,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:22,811 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:22,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:22,811 INFO L82 PathProgramCache]: Analyzing trace with hash 2031484712, now seen corresponding path program 209 times [2021-06-05 13:46:22,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:22,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660114489] [2021-06-05 13:46:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:22,936 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 13:46:22,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:22,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660114489] [2021-06-05 13:46:22,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660114489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:22,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040103319] [2021-06-05 13:46:22,937 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 13:46:22,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 13:46:22,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:22,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:22,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:23,044 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 13:46:23,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040103319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:23,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:23,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:46:23,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907677525] [2021-06-05 13:46:23,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:46:23,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:23,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:46:23,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:46:23,045 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 13:46:23,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:23,782 INFO L93 Difference]: Finished difference Result 18422 states and 44497 transitions. [2021-06-05 13:46:23,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:46:23,782 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 13:46:23,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:23,801 INFO L225 Difference]: With dead ends: 18422 [2021-06-05 13:46:23,801 INFO L226 Difference]: Without dead ends: 17582 [2021-06-05 13:46:23,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 340.7ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:46:23,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17582 states. [2021-06-05 13:46:23,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17582 to 10239. [2021-06-05 13:46:23,983 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 13:46:23,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10239 states to 10239 states and 26120 transitions. [2021-06-05 13:46:23,999 INFO L78 Accepts]: Start accepts. Automaton has 10239 states and 26120 transitions. Word has length 53 [2021-06-05 13:46:23,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:23,999 INFO L482 AbstractCegarLoop]: Abstraction has 10239 states and 26120 transitions. [2021-06-05 13:46:23,999 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 13:46:23,999 INFO L276 IsEmpty]: Start isEmpty. Operand 10239 states and 26120 transitions. [2021-06-05 13:46:24,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:24,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:24,006 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 13:46:24,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable732,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:24,207 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:24,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:24,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1793423195, now seen corresponding path program 95 times [2021-06-05 13:46:24,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:24,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495309548] [2021-06-05 13:46:24,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:24,279 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 13:46:24,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:24,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495309548] [2021-06-05 13:46:24,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495309548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:24,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927012373] [2021-06-05 13:46:24,279 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 13:46:24,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 13:46:24,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:24,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:24,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:24,468 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 13:46:24,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927012373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:24,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:24,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 18 [2021-06-05 13:46:24,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487593930] [2021-06-05 13:46:24,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:24,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:24,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:24,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:24,469 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 13:46:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:24,799 INFO L93 Difference]: Finished difference Result 12499 states and 30979 transitions. [2021-06-05 13:46:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:46:24,800 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 13:46:24,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:24,814 INFO L225 Difference]: With dead ends: 12499 [2021-06-05 13:46:24,814 INFO L226 Difference]: Without dead ends: 12485 [2021-06-05 13:46:24,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:24,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12485 states. [2021-06-05 13:46:24,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12485 to 10638. [2021-06-05 13:46:24,940 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 13:46:24,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10638 states to 10638 states and 27208 transitions. [2021-06-05 13:46:24,956 INFO L78 Accepts]: Start accepts. Automaton has 10638 states and 27208 transitions. Word has length 53 [2021-06-05 13:46:24,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:24,956 INFO L482 AbstractCegarLoop]: Abstraction has 10638 states and 27208 transitions. [2021-06-05 13:46:24,956 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 13:46:24,956 INFO L276 IsEmpty]: Start isEmpty. Operand 10638 states and 27208 transitions. [2021-06-05 13:46:24,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:24,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:24,964 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 13:46:25,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-06-05 13:46:25,164 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:25,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:25,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1171542785, now seen corresponding path program 96 times [2021-06-05 13:46:25,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:25,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4760596] [2021-06-05 13:46:25,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:25,230 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 13:46:25,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:25,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4760596] [2021-06-05 13:46:25,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4760596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:25,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120376800] [2021-06-05 13:46:25,230 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 13:46:25,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 13:46:25,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:25,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:25,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:25,346 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 13:46:25,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120376800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:25,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:25,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 13:46:25,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244580067] [2021-06-05 13:46:25,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:46:25,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:25,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:46:25,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:46:25,347 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 13:46:25,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:25,620 INFO L93 Difference]: Finished difference Result 14368 states and 35164 transitions. [2021-06-05 13:46:25,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:46:25,621 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 13:46:25,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:25,635 INFO L225 Difference]: With dead ends: 14368 [2021-06-05 13:46:25,635 INFO L226 Difference]: Without dead ends: 14368 [2021-06-05 13:46:25,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:46:25,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14368 states. [2021-06-05 13:46:25,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14368 to 10646. [2021-06-05 13:46:25,762 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 13:46:25,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10646 states to 10646 states and 27233 transitions. [2021-06-05 13:46:25,779 INFO L78 Accepts]: Start accepts. Automaton has 10646 states and 27233 transitions. Word has length 53 [2021-06-05 13:46:25,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:25,779 INFO L482 AbstractCegarLoop]: Abstraction has 10646 states and 27233 transitions. [2021-06-05 13:46:25,779 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 13:46:25,779 INFO L276 IsEmpty]: Start isEmpty. Operand 10646 states and 27233 transitions. [2021-06-05 13:46:25,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:25,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:25,786 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 13:46:25,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:25,987 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:25,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:25,987 INFO L82 PathProgramCache]: Analyzing trace with hash -466029671, now seen corresponding path program 97 times [2021-06-05 13:46:25,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:25,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734309162] [2021-06-05 13:46:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:26,062 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 13:46:26,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:26,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734309162] [2021-06-05 13:46:26,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734309162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:26,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401882102] [2021-06-05 13:46:26,062 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 13:46:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:26,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:26,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:26,174 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 13:46:26,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401882102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:26,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:26,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 13:46:26,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042091821] [2021-06-05 13:46:26,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:46:26,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:26,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:46:26,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:46:26,175 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 13:46:26,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:26,545 INFO L93 Difference]: Finished difference Result 15753 states and 38328 transitions. [2021-06-05 13:46:26,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:46:26,545 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 13:46:26,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:26,563 INFO L225 Difference]: With dead ends: 15753 [2021-06-05 13:46:26,563 INFO L226 Difference]: Without dead ends: 15753 [2021-06-05 13:46:26,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:46:26,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15753 states. [2021-06-05 13:46:26,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15753 to 10665. [2021-06-05 13:46:26,715 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 13:46:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10665 states to 10665 states and 27293 transitions. [2021-06-05 13:46:26,730 INFO L78 Accepts]: Start accepts. Automaton has 10665 states and 27293 transitions. Word has length 53 [2021-06-05 13:46:26,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:26,731 INFO L482 AbstractCegarLoop]: Abstraction has 10665 states and 27293 transitions. [2021-06-05 13:46:26,731 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 13:46:26,731 INFO L276 IsEmpty]: Start isEmpty. Operand 10665 states and 27293 transitions. [2021-06-05 13:46:26,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:26,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:26,739 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 13:46:26,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-06-05 13:46:26,939 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:26,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:26,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2138942461, now seen corresponding path program 98 times [2021-06-05 13:46:26,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:26,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080753100] [2021-06-05 13:46:26,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:27,025 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 13:46:27,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:27,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080753100] [2021-06-05 13:46:27,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080753100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:27,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332441497] [2021-06-05 13:46:27,025 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 13:46:27,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:27,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:27,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:27,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:27,189 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 13:46:27,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332441497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:27,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:27,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:46:27,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23570726] [2021-06-05 13:46:27,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:27,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:27,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:27,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:27,190 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 13:46:27,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:27,637 INFO L93 Difference]: Finished difference Result 16162 states and 39295 transitions. [2021-06-05 13:46:27,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:46:27,638 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 13:46:27,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:27,656 INFO L225 Difference]: With dead ends: 16162 [2021-06-05 13:46:27,656 INFO L226 Difference]: Without dead ends: 16162 [2021-06-05 13:46:27,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:46:27,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16162 states. [2021-06-05 13:46:27,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16162 to 10690. [2021-06-05 13:46:27,808 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 13:46:27,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10690 states to 10690 states and 27371 transitions. [2021-06-05 13:46:27,825 INFO L78 Accepts]: Start accepts. Automaton has 10690 states and 27371 transitions. Word has length 53 [2021-06-05 13:46:27,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:27,825 INFO L482 AbstractCegarLoop]: Abstraction has 10690 states and 27371 transitions. [2021-06-05 13:46:27,825 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 13:46:27,825 INFO L276 IsEmpty]: Start isEmpty. Operand 10690 states and 27371 transitions. [2021-06-05 13:46:27,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:27,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:27,833 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 13:46:28,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:28,034 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:28,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:28,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1099655449, now seen corresponding path program 99 times [2021-06-05 13:46:28,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:28,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217511711] [2021-06-05 13:46:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:28,129 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 13:46:28,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:28,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217511711] [2021-06-05 13:46:28,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217511711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:28,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176796186] [2021-06-05 13:46:28,129 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 13:46:28,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 13:46:28,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:28,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:46:28,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:28,312 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 13:46:28,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176796186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:28,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:28,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-06-05 13:46:28,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540987240] [2021-06-05 13:46:28,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:28,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:28,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:28,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:28,313 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 13:46:28,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:28,800 INFO L93 Difference]: Finished difference Result 12484 states and 30934 transitions. [2021-06-05 13:46:28,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:46:28,801 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 13:46:28,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:28,815 INFO L225 Difference]: With dead ends: 12484 [2021-06-05 13:46:28,815 INFO L226 Difference]: Without dead ends: 12484 [2021-06-05 13:46:28,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 250.3ms TimeCoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:46:28,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12484 states. [2021-06-05 13:46:28,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12484 to 10077. [2021-06-05 13:46:28,934 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 13:46:28,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10077 states to 10077 states and 25757 transitions. [2021-06-05 13:46:28,949 INFO L78 Accepts]: Start accepts. Automaton has 10077 states and 25757 transitions. Word has length 53 [2021-06-05 13:46:28,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:28,949 INFO L482 AbstractCegarLoop]: Abstraction has 10077 states and 25757 transitions. [2021-06-05 13:46:28,949 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 13:46:28,949 INFO L276 IsEmpty]: Start isEmpty. Operand 10077 states and 25757 transitions. [2021-06-05 13:46:28,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:28,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:28,956 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 13:46:29,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable738 [2021-06-05 13:46:29,156 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:29,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:29,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2113323565, now seen corresponding path program 210 times [2021-06-05 13:46:29,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:29,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150394240] [2021-06-05 13:46:29,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:29,270 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 13:46:29,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:29,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150394240] [2021-06-05 13:46:29,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150394240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:29,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699109281] [2021-06-05 13:46:29,271 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 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 13:46:29,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:46:29,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:29,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:29,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:29,380 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 13:46:29,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699109281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:29,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:29,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 13:46:29,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217179374] [2021-06-05 13:46:29,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:46:29,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:29,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:46:29,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:46:29,381 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 13:46:29,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:29,647 INFO L93 Difference]: Finished difference Result 11675 states and 28615 transitions. [2021-06-05 13:46:29,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:46:29,647 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 13:46:29,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:29,659 INFO L225 Difference]: With dead ends: 11675 [2021-06-05 13:46:29,660 INFO L226 Difference]: Without dead ends: 11621 [2021-06-05 13:46:29,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:46:29,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11621 states. [2021-06-05 13:46:29,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11621 to 10086. [2021-06-05 13:46:29,778 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 13:46:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10086 states to 10086 states and 25766 transitions. [2021-06-05 13:46:29,794 INFO L78 Accepts]: Start accepts. Automaton has 10086 states and 25766 transitions. Word has length 53 [2021-06-05 13:46:29,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:29,794 INFO L482 AbstractCegarLoop]: Abstraction has 10086 states and 25766 transitions. [2021-06-05 13:46:29,794 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 13:46:29,794 INFO L276 IsEmpty]: Start isEmpty. Operand 10086 states and 25766 transitions. [2021-06-05 13:46:29,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:29,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:29,801 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 13:46:30,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable741,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:30,002 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:30,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:30,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1980297346, now seen corresponding path program 100 times [2021-06-05 13:46:30,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:30,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610267643] [2021-06-05 13:46:30,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:30,128 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 13:46:30,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:30,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610267643] [2021-06-05 13:46:30,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610267643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:30,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338835049] [2021-06-05 13:46:30,128 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 13:46:30,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:30,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:30,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:30,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:30,233 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 13:46:30,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338835049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:30,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:30,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:46:30,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826452481] [2021-06-05 13:46:30,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:46:30,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:30,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:46:30,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:46:30,234 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 13:46:30,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:30,865 INFO L93 Difference]: Finished difference Result 14226 states and 34514 transitions. [2021-06-05 13:46:30,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:46:30,865 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 13:46:30,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:30,879 INFO L225 Difference]: With dead ends: 14226 [2021-06-05 13:46:30,880 INFO L226 Difference]: Without dead ends: 13952 [2021-06-05 13:46:30,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 337.8ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:46:30,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13952 states. [2021-06-05 13:46:30,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13952 to 9958. [2021-06-05 13:46:31,004 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 13:46:31,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9958 states to 9958 states and 25415 transitions. [2021-06-05 13:46:31,018 INFO L78 Accepts]: Start accepts. Automaton has 9958 states and 25415 transitions. Word has length 53 [2021-06-05 13:46:31,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:31,018 INFO L482 AbstractCegarLoop]: Abstraction has 9958 states and 25415 transitions. [2021-06-05 13:46:31,018 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 13:46:31,018 INFO L276 IsEmpty]: Start isEmpty. Operand 9958 states and 25415 transitions. [2021-06-05 13:46:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:31,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:31,025 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 13:46:31,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable749 [2021-06-05 13:46:31,226 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:31,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:31,226 INFO L82 PathProgramCache]: Analyzing trace with hash -217067145, now seen corresponding path program 211 times [2021-06-05 13:46:31,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:31,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525404862] [2021-06-05 13:46:31,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:31,331 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 13:46:31,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:31,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525404862] [2021-06-05 13:46:31,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525404862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:31,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453773389] [2021-06-05 13:46:31,331 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 13:46:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:31,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:31,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:31,441 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 13:46:31,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453773389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:31,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:31,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 13:46:31,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976391783] [2021-06-05 13:46:31,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:46:31,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:31,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:46:31,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:46:31,442 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 13:46:31,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:31,770 INFO L93 Difference]: Finished difference Result 12529 states and 31068 transitions. [2021-06-05 13:46:31,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:46:31,770 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 13:46:31,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:31,784 INFO L225 Difference]: With dead ends: 12529 [2021-06-05 13:46:31,784 INFO L226 Difference]: Without dead ends: 12529 [2021-06-05 13:46:31,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:46:31,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12529 states. [2021-06-05 13:46:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12529 to 10698. [2021-06-05 13:46:31,910 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 13:46:31,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10698 states to 10698 states and 27656 transitions. [2021-06-05 13:46:31,926 INFO L78 Accepts]: Start accepts. Automaton has 10698 states and 27656 transitions. Word has length 53 [2021-06-05 13:46:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:31,926 INFO L482 AbstractCegarLoop]: Abstraction has 10698 states and 27656 transitions. [2021-06-05 13:46:31,926 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 13:46:31,926 INFO L276 IsEmpty]: Start isEmpty. Operand 10698 states and 27656 transitions. [2021-06-05 13:46:31,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:31,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:31,933 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 13:46:32,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable750,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:32,133 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:32,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:32,134 INFO L82 PathProgramCache]: Analyzing trace with hash 2097202474, now seen corresponding path program 101 times [2021-06-05 13:46:32,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:32,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979120223] [2021-06-05 13:46:32,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:32,264 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 13:46:32,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:32,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979120223] [2021-06-05 13:46:32,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979120223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:32,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638723970] [2021-06-05 13:46:32,264 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 13:46:32,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 13:46:32,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:32,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:32,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:32,396 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 13:46:32,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638723970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:32,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:32,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:46:32,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338841768] [2021-06-05 13:46:32,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:46:32,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:32,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:46:32,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:46:32,397 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 13:46:33,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:33,068 INFO L93 Difference]: Finished difference Result 14809 states and 36436 transitions. [2021-06-05 13:46:33,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:46:33,069 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 13:46:33,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:33,086 INFO L225 Difference]: With dead ends: 14809 [2021-06-05 13:46:33,086 INFO L226 Difference]: Without dead ends: 14757 [2021-06-05 13:46:33,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 308.2ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:46:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14757 states. [2021-06-05 13:46:33,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14757 to 10607. [2021-06-05 13:46:33,227 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 13:46:33,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10607 states to 10607 states and 27441 transitions. [2021-06-05 13:46:33,244 INFO L78 Accepts]: Start accepts. Automaton has 10607 states and 27441 transitions. Word has length 53 [2021-06-05 13:46:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:33,244 INFO L482 AbstractCegarLoop]: Abstraction has 10607 states and 27441 transitions. [2021-06-05 13:46:33,245 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 13:46:33,245 INFO L276 IsEmpty]: Start isEmpty. Operand 10607 states and 27441 transitions. [2021-06-05 13:46:33,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:33,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:33,252 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 13:46:33,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-05 13:46:33,453 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:33,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:33,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1617639658, now seen corresponding path program 212 times [2021-06-05 13:46:33,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:33,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429158217] [2021-06-05 13:46:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:33,592 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 13:46:33,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:33,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429158217] [2021-06-05 13:46:33,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429158217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:33,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140020429] [2021-06-05 13:46:33,592 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 13:46:33,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:33,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:33,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:33,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:33,866 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 13:46:33,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140020429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:33,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:33,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 13:46:33,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456679720] [2021-06-05 13:46:33,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:46:33,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:33,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:46:33,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:33,867 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 13:46:34,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:34,566 INFO L93 Difference]: Finished difference Result 10731 states and 27633 transitions. [2021-06-05 13:46:34,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:46:34,567 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 13:46:34,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:34,577 INFO L225 Difference]: With dead ends: 10731 [2021-06-05 13:46:34,577 INFO L226 Difference]: Without dead ends: 10675 [2021-06-05 13:46:34,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:46:34,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10675 states. [2021-06-05 13:46:34,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10675 to 10607. [2021-06-05 13:46:34,690 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 13:46:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10607 states to 10607 states and 27408 transitions. [2021-06-05 13:46:34,706 INFO L78 Accepts]: Start accepts. Automaton has 10607 states and 27408 transitions. Word has length 53 [2021-06-05 13:46:34,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:34,706 INFO L482 AbstractCegarLoop]: Abstraction has 10607 states and 27408 transitions. [2021-06-05 13:46:34,706 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 13:46:34,706 INFO L276 IsEmpty]: Start isEmpty. Operand 10607 states and 27408 transitions. [2021-06-05 13:46:34,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:34,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:34,713 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 13:46:34,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable752 [2021-06-05 13:46:34,913 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:34,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:34,913 INFO L82 PathProgramCache]: Analyzing trace with hash -290292687, now seen corresponding path program 102 times [2021-06-05 13:46:34,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:34,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117075197] [2021-06-05 13:46:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:35,003 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 13:46:35,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:35,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117075197] [2021-06-05 13:46:35,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117075197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:35,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555112448] [2021-06-05 13:46:35,003 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 13:46:35,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 13:46:35,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:35,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:35,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:35,136 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 13:46:35,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555112448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:35,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:35,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2021-06-05 13:46:35,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949187323] [2021-06-05 13:46:35,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:46:35,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:35,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:46:35,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:46:35,137 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 13:46:35,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:35,435 INFO L93 Difference]: Finished difference Result 12680 states and 31642 transitions. [2021-06-05 13:46:35,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:46:35,435 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 13:46:35,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:35,449 INFO L225 Difference]: With dead ends: 12680 [2021-06-05 13:46:35,449 INFO L226 Difference]: Without dead ends: 12630 [2021-06-05 13:46:35,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:35,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12630 states. [2021-06-05 13:46:35,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12630 to 10144. [2021-06-05 13:46:35,574 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 13:46:35,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 26207 transitions. [2021-06-05 13:46:35,590 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 26207 transitions. Word has length 53 [2021-06-05 13:46:35,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:35,590 INFO L482 AbstractCegarLoop]: Abstraction has 10144 states and 26207 transitions. [2021-06-05 13:46:35,590 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 13:46:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 26207 transitions. [2021-06-05 13:46:35,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:35,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:35,597 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 13:46:35,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:35,798 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:35,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:35,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1595716629, now seen corresponding path program 213 times [2021-06-05 13:46:35,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:35,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941934588] [2021-06-05 13:46:35,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:35,888 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 13:46:35,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:35,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941934588] [2021-06-05 13:46:35,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941934588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:35,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182400416] [2021-06-05 13:46:35,888 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 13:46:35,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 13:46:35,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:35,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:35,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:36,002 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 13:46:36,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182400416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:36,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:36,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 13:46:36,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269129561] [2021-06-05 13:46:36,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:36,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:36,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:36,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:36,003 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 13:46:36,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:36,293 INFO L93 Difference]: Finished difference Result 12591 states and 31328 transitions. [2021-06-05 13:46:36,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:46:36,293 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 13:46:36,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:36,308 INFO L225 Difference]: With dead ends: 12591 [2021-06-05 13:46:36,308 INFO L226 Difference]: Without dead ends: 12591 [2021-06-05 13:46:36,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:36,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12591 states. [2021-06-05 13:46:36,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12591 to 10616. [2021-06-05 13:46:36,433 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 13:46:36,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10616 states to 10616 states and 27616 transitions. [2021-06-05 13:46:36,450 INFO L78 Accepts]: Start accepts. Automaton has 10616 states and 27616 transitions. Word has length 53 [2021-06-05 13:46:36,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:36,451 INFO L482 AbstractCegarLoop]: Abstraction has 10616 states and 27616 transitions. [2021-06-05 13:46:36,451 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 13:46:36,451 INFO L276 IsEmpty]: Start isEmpty. Operand 10616 states and 27616 transitions. [2021-06-05 13:46:36,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:36,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:36,458 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 13:46:36,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable759 [2021-06-05 13:46:36,658 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:36,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:36,659 INFO L82 PathProgramCache]: Analyzing trace with hash -2006879870, now seen corresponding path program 103 times [2021-06-05 13:46:36,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:36,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349638349] [2021-06-05 13:46:36,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:36,767 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 13:46:36,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:36,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349638349] [2021-06-05 13:46:36,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349638349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:36,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883352702] [2021-06-05 13:46:36,767 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 13:46:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:36,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:36,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:36,873 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 13:46:36,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883352702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:36,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:36,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:46:36,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127154215] [2021-06-05 13:46:36,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:36,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:36,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:36,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:36,874 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 13:46:37,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:37,456 INFO L93 Difference]: Finished difference Result 13894 states and 34616 transitions. [2021-06-05 13:46:37,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:46:37,457 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 13:46:37,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:37,473 INFO L225 Difference]: With dead ends: 13894 [2021-06-05 13:46:37,473 INFO L226 Difference]: Without dead ends: 13880 [2021-06-05 13:46:37,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:46:37,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13880 states. [2021-06-05 13:46:37,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13880 to 10564. [2021-06-05 13:46:37,618 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 13:46:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10564 states to 10564 states and 27526 transitions. [2021-06-05 13:46:37,634 INFO L78 Accepts]: Start accepts. Automaton has 10564 states and 27526 transitions. Word has length 53 [2021-06-05 13:46:37,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:37,635 INFO L482 AbstractCegarLoop]: Abstraction has 10564 states and 27526 transitions. [2021-06-05 13:46:37,635 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 13:46:37,635 INFO L276 IsEmpty]: Start isEmpty. Operand 10564 states and 27526 transitions. [2021-06-05 13:46:37,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:37,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:37,642 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 13:46:37,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable760,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:37,842 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:37,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:37,842 INFO L82 PathProgramCache]: Analyzing trace with hash 2126035330, now seen corresponding path program 214 times [2021-06-05 13:46:37,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:37,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524232101] [2021-06-05 13:46:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:37,954 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 13:46:37,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:37,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524232101] [2021-06-05 13:46:37,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524232101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:37,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605592603] [2021-06-05 13:46:37,955 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 13:46:37,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:37,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:37,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:37,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:38,149 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 13:46:38,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605592603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:38,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:38,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 13:46:38,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122746598] [2021-06-05 13:46:38,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:46:38,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:38,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:46:38,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:46:38,150 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 13:46:38,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:38,733 INFO L93 Difference]: Finished difference Result 10719 states and 27762 transitions. [2021-06-05 13:46:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:46:38,734 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 13:46:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:38,746 INFO L225 Difference]: With dead ends: 10719 [2021-06-05 13:46:38,746 INFO L226 Difference]: Without dead ends: 10675 [2021-06-05 13:46:38,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:38,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10675 states. [2021-06-05 13:46:38,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10675 to 10564. [2021-06-05 13:46:38,872 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 13:46:38,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10564 states to 10564 states and 27508 transitions. [2021-06-05 13:46:38,888 INFO L78 Accepts]: Start accepts. Automaton has 10564 states and 27508 transitions. Word has length 53 [2021-06-05 13:46:38,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:38,888 INFO L482 AbstractCegarLoop]: Abstraction has 10564 states and 27508 transitions. [2021-06-05 13:46:38,888 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 13:46:38,888 INFO L276 IsEmpty]: Start isEmpty. Operand 10564 states and 27508 transitions. [2021-06-05 13:46:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:38,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:38,895 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 13:46:39,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-06-05 13:46:39,096 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:39,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:39,096 INFO L82 PathProgramCache]: Analyzing trace with hash 145337653, now seen corresponding path program 104 times [2021-06-05 13:46:39,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:39,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639332158] [2021-06-05 13:46:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:39,182 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 13:46:39,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:39,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639332158] [2021-06-05 13:46:39,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639332158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:39,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445615408] [2021-06-05 13:46:39,183 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 13:46:39,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:39,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:39,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:39,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:39,295 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 13:46:39,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445615408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:39,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:39,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 13:46:39,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764037931] [2021-06-05 13:46:39,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:46:39,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:39,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:46:39,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:46:39,296 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 13:46:39,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:39,569 INFO L93 Difference]: Finished difference Result 12086 states and 30576 transitions. [2021-06-05 13:46:39,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:46:39,569 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 13:46:39,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:39,582 INFO L225 Difference]: With dead ends: 12086 [2021-06-05 13:46:39,583 INFO L226 Difference]: Without dead ends: 12002 [2021-06-05 13:46:39,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:39,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2021-06-05 13:46:39,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 9748. [2021-06-05 13:46:39,706 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 13:46:39,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9748 states to 9748 states and 25372 transitions. [2021-06-05 13:46:39,721 INFO L78 Accepts]: Start accepts. Automaton has 9748 states and 25372 transitions. Word has length 53 [2021-06-05 13:46:39,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:39,721 INFO L482 AbstractCegarLoop]: Abstraction has 9748 states and 25372 transitions. [2021-06-05 13:46:39,721 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 13:46:39,722 INFO L276 IsEmpty]: Start isEmpty. Operand 9748 states and 25372 transitions. [2021-06-05 13:46:39,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:39,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:39,728 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 13:46:39,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable762,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:39,929 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:39,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:39,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1808139831, now seen corresponding path program 215 times [2021-06-05 13:46:39,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:39,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149678861] [2021-06-05 13:46:39,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:40,010 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 13:46:40,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:40,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149678861] [2021-06-05 13:46:40,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149678861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:40,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134442055] [2021-06-05 13:46:40,010 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 13:46:40,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 13:46:40,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:40,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:40,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:40,136 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 13:46:40,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134442055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:40,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:40,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 14 [2021-06-05 13:46:40,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660802509] [2021-06-05 13:46:40,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:46:40,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:40,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:46:40,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:46:40,137 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 13:46:40,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:40,410 INFO L93 Difference]: Finished difference Result 12328 states and 30680 transitions. [2021-06-05 13:46:40,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:46:40,410 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 13:46:40,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:40,426 INFO L225 Difference]: With dead ends: 12328 [2021-06-05 13:46:40,426 INFO L226 Difference]: Without dead ends: 12328 [2021-06-05 13:46:40,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:46:40,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12328 states. [2021-06-05 13:46:40,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12328 to 10133. [2021-06-05 13:46:40,585 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 13:46:40,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10133 states to 10133 states and 26526 transitions. [2021-06-05 13:46:40,602 INFO L78 Accepts]: Start accepts. Automaton has 10133 states and 26526 transitions. Word has length 53 [2021-06-05 13:46:40,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:40,602 INFO L482 AbstractCegarLoop]: Abstraction has 10133 states and 26526 transitions. [2021-06-05 13:46:40,602 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 13:46:40,602 INFO L276 IsEmpty]: Start isEmpty. Operand 10133 states and 26526 transitions. [2021-06-05 13:46:40,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:40,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:40,609 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 13:46:40,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:40,810 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:40,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:40,810 INFO L82 PathProgramCache]: Analyzing trace with hash -933239766, now seen corresponding path program 105 times [2021-06-05 13:46:40,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:40,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832592928] [2021-06-05 13:46:40,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:40,904 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 13:46:40,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:40,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832592928] [2021-06-05 13:46:40,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832592928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:40,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521569533] [2021-06-05 13:46:40,904 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 13:46:40,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 13:46:40,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:40,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:40,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:41,014 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 13:46:41,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521569533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:41,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:41,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:46:41,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078275006] [2021-06-05 13:46:41,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:46:41,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:41,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:46:41,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:46:41,015 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 13:46:41,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:41,557 INFO L93 Difference]: Finished difference Result 12314 states and 31139 transitions. [2021-06-05 13:46:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:46:41,557 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 13:46:41,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:41,570 INFO L225 Difference]: With dead ends: 12314 [2021-06-05 13:46:41,570 INFO L226 Difference]: Without dead ends: 12300 [2021-06-05 13:46:41,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 193.3ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:46:41,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12300 states. [2021-06-05 13:46:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12300 to 10160. [2021-06-05 13:46:41,679 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 13:46:41,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10160 states to 10160 states and 26605 transitions. [2021-06-05 13:46:41,694 INFO L78 Accepts]: Start accepts. Automaton has 10160 states and 26605 transitions. Word has length 53 [2021-06-05 13:46:41,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:41,694 INFO L482 AbstractCegarLoop]: Abstraction has 10160 states and 26605 transitions. [2021-06-05 13:46:41,694 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 13:46:41,694 INFO L276 IsEmpty]: Start isEmpty. Operand 10160 states and 26605 transitions. [2021-06-05 13:46:41,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:41,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:41,700 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 13:46:41,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable769 [2021-06-05 13:46:41,901 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:41,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:41,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1110130710, now seen corresponding path program 216 times [2021-06-05 13:46:41,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:41,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89367651] [2021-06-05 13:46:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:41,998 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 13:46:41,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:41,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89367651] [2021-06-05 13:46:41,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89367651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:41,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459539600] [2021-06-05 13:46:41,999 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 13:46:42,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 13:46:42,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:42,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:42,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:42,173 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 13:46:42,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459539600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:42,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:42,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 13:46:42,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613038811] [2021-06-05 13:46:42,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:46:42,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:42,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:46:42,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:46:42,174 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 13:46:42,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:42,606 INFO L93 Difference]: Finished difference Result 10211 states and 26683 transitions. [2021-06-05 13:46:42,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:46:42,607 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 13:46:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:42,617 INFO L225 Difference]: With dead ends: 10211 [2021-06-05 13:46:42,617 INFO L226 Difference]: Without dead ends: 10179 [2021-06-05 13:46:42,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:46:42,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10179 states. [2021-06-05 13:46:42,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10179 to 10160. [2021-06-05 13:46:42,715 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 13:46:42,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10160 states to 10160 states and 26599 transitions. [2021-06-05 13:46:42,730 INFO L78 Accepts]: Start accepts. Automaton has 10160 states and 26599 transitions. Word has length 53 [2021-06-05 13:46:42,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:42,730 INFO L482 AbstractCegarLoop]: Abstraction has 10160 states and 26599 transitions. [2021-06-05 13:46:42,730 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 13:46:42,730 INFO L276 IsEmpty]: Start isEmpty. Operand 10160 states and 26599 transitions. [2021-06-05 13:46:42,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:42,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:42,736 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 13:46:42,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:42,937 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:42,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:42,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1855932587, now seen corresponding path program 217 times [2021-06-05 13:46:42,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:42,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990548081] [2021-06-05 13:46:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:43,007 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 13:46:43,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:43,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990548081] [2021-06-05 13:46:43,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990548081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:43,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545071430] [2021-06-05 13:46:43,008 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 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 13:46:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:43,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:46:43,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:43,136 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 13:46:43,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545071430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:43,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:43,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 13:46:43,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696267029] [2021-06-05 13:46:43,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:43,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:43,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:43,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:43,137 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 13:46:43,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:43,360 INFO L93 Difference]: Finished difference Result 12704 states and 31833 transitions. [2021-06-05 13:46:43,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:46:43,361 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 13:46:43,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:43,375 INFO L225 Difference]: With dead ends: 12704 [2021-06-05 13:46:43,375 INFO L226 Difference]: Without dead ends: 12704 [2021-06-05 13:46:43,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:46:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12704 states. [2021-06-05 13:46:43,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12704 to 10580. [2021-06-05 13:46:43,507 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 13:46:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10580 states to 10580 states and 27851 transitions. [2021-06-05 13:46:43,524 INFO L78 Accepts]: Start accepts. Automaton has 10580 states and 27851 transitions. Word has length 53 [2021-06-05 13:46:43,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:43,524 INFO L482 AbstractCegarLoop]: Abstraction has 10580 states and 27851 transitions. [2021-06-05 13:46:43,524 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 13:46:43,524 INFO L276 IsEmpty]: Start isEmpty. Operand 10580 states and 27851 transitions. [2021-06-05 13:46:43,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:43,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:43,530 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 13:46:43,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable771 [2021-06-05 13:46:43,731 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:43,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:43,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1668199042, now seen corresponding path program 106 times [2021-06-05 13:46:43,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:43,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660713402] [2021-06-05 13:46:43,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:43,861 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 13:46:43,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:43,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660713402] [2021-06-05 13:46:43,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660713402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:43,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168357542] [2021-06-05 13:46:43,862 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 13:46:43,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:43,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:43,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 13:46:43,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:43,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 13:46:43,999 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 13:46:44,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:46:44,002 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 13:46:44,002 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 13:46:44,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:46:44,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 13:46:44,009 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 13:46:44,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168357542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:44,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:44,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 13:46:44,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495298282] [2021-06-05 13:46:44,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:44,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:44,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:44,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:44,010 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 13:46:44,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:44,605 INFO L93 Difference]: Finished difference Result 13655 states and 34305 transitions. [2021-06-05 13:46:44,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:46:44,606 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 13:46:44,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:44,620 INFO L225 Difference]: With dead ends: 13655 [2021-06-05 13:46:44,621 INFO L226 Difference]: Without dead ends: 13599 [2021-06-05 13:46:44,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:46:44,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13599 states. [2021-06-05 13:46:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13599 to 11353. [2021-06-05 13:46:44,764 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 13:46:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11353 states to 11353 states and 29747 transitions. [2021-06-05 13:46:44,782 INFO L78 Accepts]: Start accepts. Automaton has 11353 states and 29747 transitions. Word has length 53 [2021-06-05 13:46:44,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:44,782 INFO L482 AbstractCegarLoop]: Abstraction has 11353 states and 29747 transitions. [2021-06-05 13:46:44,782 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 13:46:44,783 INFO L276 IsEmpty]: Start isEmpty. Operand 11353 states and 29747 transitions. [2021-06-05 13:46:44,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:44,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:44,790 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 13:46:44,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-06-05 13:46:44,993 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:44,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:44,993 INFO L82 PathProgramCache]: Analyzing trace with hash 34902658, now seen corresponding path program 218 times [2021-06-05 13:46:44,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:44,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415075334] [2021-06-05 13:46:44,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:45,079 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 13:46:45,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:45,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415075334] [2021-06-05 13:46:45,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415075334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:45,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108522390] [2021-06-05 13:46:45,080 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 13:46:45,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:45,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:45,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:45,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:45,220 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 13:46:45,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108522390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:45,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:45,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 13:46:45,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100940571] [2021-06-05 13:46:45,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:46:45,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:45,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:46:45,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:46:45,221 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 13:46:45,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:45,551 INFO L93 Difference]: Finished difference Result 11423 states and 29849 transitions. [2021-06-05 13:46:45,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:46:45,552 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 13:46:45,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:45,564 INFO L225 Difference]: With dead ends: 11423 [2021-06-05 13:46:45,564 INFO L226 Difference]: Without dead ends: 11403 [2021-06-05 13:46:45,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:45,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11403 states. [2021-06-05 13:46:45,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11403 to 11353. [2021-06-05 13:46:45,694 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 13:46:45,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11353 states to 11353 states and 29744 transitions. [2021-06-05 13:46:45,713 INFO L78 Accepts]: Start accepts. Automaton has 11353 states and 29744 transitions. Word has length 53 [2021-06-05 13:46:45,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:45,714 INFO L482 AbstractCegarLoop]: Abstraction has 11353 states and 29744 transitions. [2021-06-05 13:46:45,714 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 13:46:45,714 INFO L276 IsEmpty]: Start isEmpty. Operand 11353 states and 29744 transitions. [2021-06-05 13:46:45,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:45,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:45,722 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 13:46:45,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:45,922 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:45,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:45,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1588490357, now seen corresponding path program 107 times [2021-06-05 13:46:45,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:45,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377886025] [2021-06-05 13:46:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:46,000 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 13:46:46,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:46,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377886025] [2021-06-05 13:46:46,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377886025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:46,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817764419] [2021-06-05 13:46:46,001 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 13:46:46,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 13:46:46,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:46,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:46,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:46,164 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 13:46:46,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817764419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:46,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:46,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 19 [2021-06-05 13:46:46,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528777663] [2021-06-05 13:46:46,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:46:46,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:46,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:46:46,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:46:46,165 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 13:46:46,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:46,488 INFO L93 Difference]: Finished difference Result 12639 states and 32192 transitions. [2021-06-05 13:46:46,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:46:46,489 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 13:46:46,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:46,506 INFO L225 Difference]: With dead ends: 12639 [2021-06-05 13:46:46,506 INFO L226 Difference]: Without dead ends: 12617 [2021-06-05 13:46:46,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:46:46,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12617 states. [2021-06-05 13:46:46,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12617 to 11299. [2021-06-05 13:46:46,648 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 13:46:46,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11299 states to 11299 states and 29626 transitions. [2021-06-05 13:46:46,664 INFO L78 Accepts]: Start accepts. Automaton has 11299 states and 29626 transitions. Word has length 53 [2021-06-05 13:46:46,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:46,664 INFO L482 AbstractCegarLoop]: Abstraction has 11299 states and 29626 transitions. [2021-06-05 13:46:46,664 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 13:46:46,664 INFO L276 IsEmpty]: Start isEmpty. Operand 11299 states and 29626 transitions. [2021-06-05 13:46:46,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:46,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:46,671 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 13:46:46,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable776 [2021-06-05 13:46:46,872 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:46,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:46,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1668467447, now seen corresponding path program 219 times [2021-06-05 13:46:46,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:46,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301458606] [2021-06-05 13:46:46,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:46,953 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 13:46:46,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:46,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301458606] [2021-06-05 13:46:46,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301458606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:46,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056766333] [2021-06-05 13:46:46,953 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 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 13:46:46,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 13:46:46,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:46,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:46,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:47,151 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 13:46:47,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056766333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:47,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:47,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 13:46:47,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581369013] [2021-06-05 13:46:47,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:46:47,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:47,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:46:47,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:46:47,152 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 13:46:47,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:47,319 INFO L93 Difference]: Finished difference Result 14216 states and 35571 transitions. [2021-06-05 13:46:47,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:47,320 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 13:46:47,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:47,336 INFO L225 Difference]: With dead ends: 14216 [2021-06-05 13:46:47,337 INFO L226 Difference]: Without dead ends: 14216 [2021-06-05 13:46:47,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:46:47,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14216 states. [2021-06-05 13:46:47,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14216 to 11759. [2021-06-05 13:46:47,483 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 13:46:47,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11759 states to 11759 states and 30981 transitions. [2021-06-05 13:46:47,501 INFO L78 Accepts]: Start accepts. Automaton has 11759 states and 30981 transitions. Word has length 53 [2021-06-05 13:46:47,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:47,501 INFO L482 AbstractCegarLoop]: Abstraction has 11759 states and 30981 transitions. [2021-06-05 13:46:47,501 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 13:46:47,501 INFO L276 IsEmpty]: Start isEmpty. Operand 11759 states and 30981 transitions. [2021-06-05 13:46:47,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:47,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:47,508 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 13:46:47,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable779,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:47,709 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:47,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:47,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1430405930, now seen corresponding path program 108 times [2021-06-05 13:46:47,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:47,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219377035] [2021-06-05 13:46:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:47,804 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 13:46:47,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:47,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219377035] [2021-06-05 13:46:47,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219377035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:47,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608451616] [2021-06-05 13:46:47,804 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 13:46:47,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 13:46:47,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:47,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:47,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:47,912 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 13:46:47,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608451616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:47,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:47,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:46:47,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197796147] [2021-06-05 13:46:47,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:46:47,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:47,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:46:47,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:46:47,913 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 13:46:48,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:48,401 INFO L93 Difference]: Finished difference Result 12771 states and 32920 transitions. [2021-06-05 13:46:48,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:46:48,401 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 13:46:48,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:48,417 INFO L225 Difference]: With dead ends: 12771 [2021-06-05 13:46:48,417 INFO L226 Difference]: Without dead ends: 12763 [2021-06-05 13:46:48,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:46:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-06-05 13:46:48,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 11651. [2021-06-05 13:46:48,588 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 13:46:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11651 states to 11651 states and 30717 transitions. [2021-06-05 13:46:48,611 INFO L78 Accepts]: Start accepts. Automaton has 11651 states and 30717 transitions. Word has length 53 [2021-06-05 13:46:48,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:48,611 INFO L482 AbstractCegarLoop]: Abstraction has 11651 states and 30717 transitions. [2021-06-05 13:46:48,612 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 13:46:48,612 INFO L276 IsEmpty]: Start isEmpty. Operand 11651 states and 30717 transitions. [2021-06-05 13:46:48,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:48,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:48,621 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 13:46:48,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:48,833 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:48,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:48,833 INFO L82 PathProgramCache]: Analyzing trace with hash -123290927, now seen corresponding path program 220 times [2021-06-05 13:46:48,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:48,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125878514] [2021-06-05 13:46:48,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:48,904 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 13:46:48,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:48,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125878514] [2021-06-05 13:46:48,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125878514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:48,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381957481] [2021-06-05 13:46:48,904 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 13:46:48,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:48,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:48,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:48,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:49,011 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 13:46:49,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381957481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:49,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:49,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 13:46:49,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752075149] [2021-06-05 13:46:49,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:46:49,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:49,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:46:49,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:46:49,011 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 13:46:49,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:49,167 INFO L93 Difference]: Finished difference Result 13925 states and 34879 transitions. [2021-06-05 13:46:49,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:49,167 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 13:46:49,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:49,182 INFO L225 Difference]: With dead ends: 13925 [2021-06-05 13:46:49,183 INFO L226 Difference]: Without dead ends: 13922 [2021-06-05 13:46:49,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:46:49,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13922 states. [2021-06-05 13:46:49,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13922 to 11650. [2021-06-05 13:46:49,330 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 13:46:49,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 30710 transitions. [2021-06-05 13:46:49,349 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 30710 transitions. Word has length 53 [2021-06-05 13:46:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:49,349 INFO L482 AbstractCegarLoop]: Abstraction has 11650 states and 30710 transitions. [2021-06-05 13:46:49,349 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 13:46:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 30710 transitions. [2021-06-05 13:46:49,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:49,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:49,357 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 13:46:49,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:49,557 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:49,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:49,557 INFO L82 PathProgramCache]: Analyzing trace with hash 83771639, now seen corresponding path program 221 times [2021-06-05 13:46:49,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:49,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965073592] [2021-06-05 13:46:49,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:49,623 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 13:46:49,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:49,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965073592] [2021-06-05 13:46:49,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965073592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:49,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006419716] [2021-06-05 13:46:49,623 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 13:46:49,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 13:46:49,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:49,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:49,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:49,760 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 13:46:49,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006419716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:49,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:49,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-06-05 13:46:49,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668336968] [2021-06-05 13:46:49,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:49,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:49,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:49,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:49,762 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 13:46:49,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:49,975 INFO L93 Difference]: Finished difference Result 14037 states and 35373 transitions. [2021-06-05 13:46:49,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:46:49,976 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 13:46:49,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:49,993 INFO L225 Difference]: With dead ends: 14037 [2021-06-05 13:46:49,994 INFO L226 Difference]: Without dead ends: 14025 [2021-06-05 13:46:49,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:46:50,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14025 states. [2021-06-05 13:46:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14025 to 11650. [2021-06-05 13:46:50,165 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 13:46:50,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 30707 transitions. [2021-06-05 13:46:50,181 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 30707 transitions. Word has length 53 [2021-06-05 13:46:50,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:50,181 INFO L482 AbstractCegarLoop]: Abstraction has 11650 states and 30707 transitions. [2021-06-05 13:46:50,181 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 13:46:50,182 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 30707 transitions. [2021-06-05 13:46:50,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:50,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:50,189 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 13:46:50,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-06-05 13:46:50,389 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:50,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:50,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1364228374, now seen corresponding path program 222 times [2021-06-05 13:46:50,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:50,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277374153] [2021-06-05 13:46:50,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:50,469 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 13:46:50,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:50,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277374153] [2021-06-05 13:46:50,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277374153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:50,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604303832] [2021-06-05 13:46:50,469 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 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 13:46:50,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 13:46:50,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:50,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:50,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:50,590 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 13:46:50,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604303832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:50,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:50,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:46:50,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997485706] [2021-06-05 13:46:50,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:46:50,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:50,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:46:50,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:46:50,591 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 13:46:51,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:51,138 INFO L93 Difference]: Finished difference Result 12517 states and 32320 transitions. [2021-06-05 13:46:51,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:46:51,138 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 13:46:51,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:51,151 INFO L225 Difference]: With dead ends: 12517 [2021-06-05 13:46:51,151 INFO L226 Difference]: Without dead ends: 12384 [2021-06-05 13:46:51,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:46:51,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12384 states. [2021-06-05 13:46:51,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12384 to 11825. [2021-06-05 13:46:51,293 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 13:46:51,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11825 states to 11825 states and 31060 transitions. [2021-06-05 13:46:51,312 INFO L78 Accepts]: Start accepts. Automaton has 11825 states and 31060 transitions. Word has length 53 [2021-06-05 13:46:51,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:51,312 INFO L482 AbstractCegarLoop]: Abstraction has 11825 states and 31060 transitions. [2021-06-05 13:46:51,312 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 13:46:51,312 INFO L276 IsEmpty]: Start isEmpty. Operand 11825 states and 31060 transitions. [2021-06-05 13:46:51,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:51,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:51,319 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 13:46:51,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-06-05 13:46:51,520 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:51,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:51,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1977764554, now seen corresponding path program 223 times [2021-06-05 13:46:51,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:51,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673430699] [2021-06-05 13:46:51,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:51,603 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 13:46:51,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:51,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673430699] [2021-06-05 13:46:51,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673430699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:51,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003654057] [2021-06-05 13:46:51,603 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 13:46:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:51,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:51,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:51,709 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 13:46:51,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003654057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:51,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:51,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:46:51,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051882721] [2021-06-05 13:46:51,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:46:51,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:51,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:46:51,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:46:51,709 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 13:46:52,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:52,094 INFO L93 Difference]: Finished difference Result 12581 states and 32513 transitions. [2021-06-05 13:46:52,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:46:52,095 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 13:46:52,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:52,109 INFO L225 Difference]: With dead ends: 12581 [2021-06-05 13:46:52,109 INFO L226 Difference]: Without dead ends: 12569 [2021-06-05 13:46:52,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:46:52,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12569 states. [2021-06-05 13:46:52,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12569 to 11827. [2021-06-05 13:46:52,238 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 13:46:52,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11827 states to 11827 states and 31064 transitions. [2021-06-05 13:46:52,256 INFO L78 Accepts]: Start accepts. Automaton has 11827 states and 31064 transitions. Word has length 53 [2021-06-05 13:46:52,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:52,257 INFO L482 AbstractCegarLoop]: Abstraction has 11827 states and 31064 transitions. [2021-06-05 13:46:52,257 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 13:46:52,257 INFO L276 IsEmpty]: Start isEmpty. Operand 11827 states and 31064 transitions. [2021-06-05 13:46:52,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:52,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:52,264 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 13:46:52,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable787,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:52,464 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:52,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:52,464 INFO L82 PathProgramCache]: Analyzing trace with hash 164152780, now seen corresponding path program 224 times [2021-06-05 13:46:52,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:52,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798518057] [2021-06-05 13:46:52,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:52,546 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 13:46:52,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:52,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798518057] [2021-06-05 13:46:52,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798518057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:52,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953184412] [2021-06-05 13:46:52,547 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 13:46:52,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:52,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:52,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:52,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:52,659 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 13:46:52,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953184412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:52,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:52,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:46:52,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441013239] [2021-06-05 13:46:52,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:46:52,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:52,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:46:52,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:46:52,660 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 13:46:53,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:53,346 INFO L93 Difference]: Finished difference Result 13836 states and 35142 transitions. [2021-06-05 13:46:53,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:46:53,346 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 13:46:53,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:53,362 INFO L225 Difference]: With dead ends: 13836 [2021-06-05 13:46:53,362 INFO L226 Difference]: Without dead ends: 13782 [2021-06-05 13:46:53,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 250.5ms TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:46:53,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13782 states. [2021-06-05 13:46:53,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13782 to 11958. [2021-06-05 13:46:53,541 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 13:46:53,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11958 states to 11958 states and 31404 transitions. [2021-06-05 13:46:53,562 INFO L78 Accepts]: Start accepts. Automaton has 11958 states and 31404 transitions. Word has length 53 [2021-06-05 13:46:53,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:53,562 INFO L482 AbstractCegarLoop]: Abstraction has 11958 states and 31404 transitions. [2021-06-05 13:46:53,562 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 13:46:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 11958 states and 31404 transitions. [2021-06-05 13:46:53,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:53,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:53,571 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 13:46:53,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable788 [2021-06-05 13:46:53,771 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:53,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:53,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1696711889, now seen corresponding path program 225 times [2021-06-05 13:46:53,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:53,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165527737] [2021-06-05 13:46:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:53,846 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 13:46:53,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:53,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165527737] [2021-06-05 13:46:53,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165527737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:53,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745346322] [2021-06-05 13:46:53,846 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 13:46:53,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 13:46:53,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:53,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:53,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:53,957 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 13:46:53,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745346322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:53,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:53,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:46:53,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622870360] [2021-06-05 13:46:53,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:46:53,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:53,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:46:53,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:46:53,957 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 13:46:54,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:54,125 INFO L93 Difference]: Finished difference Result 14190 states and 35732 transitions. [2021-06-05 13:46:54,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:54,125 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 13:46:54,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:54,140 INFO L225 Difference]: With dead ends: 14190 [2021-06-05 13:46:54,140 INFO L226 Difference]: Without dead ends: 14172 [2021-06-05 13:46:54,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:54,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14172 states. [2021-06-05 13:46:54,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14172 to 12156. [2021-06-05 13:46:54,284 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 13:46:54,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12156 states to 12156 states and 32015 transitions. [2021-06-05 13:46:54,302 INFO L78 Accepts]: Start accepts. Automaton has 12156 states and 32015 transitions. Word has length 53 [2021-06-05 13:46:54,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:54,303 INFO L482 AbstractCegarLoop]: Abstraction has 12156 states and 32015 transitions. [2021-06-05 13:46:54,303 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 13:46:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand 12156 states and 32015 transitions. [2021-06-05 13:46:54,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:54,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:54,310 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 13:46:54,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable789 [2021-06-05 13:46:54,510 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:54,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:54,511 INFO L82 PathProgramCache]: Analyzing trace with hash 318989314, now seen corresponding path program 226 times [2021-06-05 13:46:54,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:54,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961071371] [2021-06-05 13:46:54,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:54,602 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 13:46:54,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:54,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961071371] [2021-06-05 13:46:54,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961071371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:54,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246684771] [2021-06-05 13:46:54,602 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 13:46:54,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:54,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:54,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 13:46:54,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:54,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 13:46:54,744 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 13:46:54,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:46:54,746 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 13:46:54,746 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 13:46:54,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:46:54,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 13:46:54,754 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 13:46:54,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246684771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:54,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:54,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 13:46:54,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316279831] [2021-06-05 13:46:54,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:46:54,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:54,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:46:54,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:46:54,754 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 13:46:55,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:55,898 INFO L93 Difference]: Finished difference Result 16988 states and 42019 transitions. [2021-06-05 13:46:55,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 13:46:55,898 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 13:46:55,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:55,919 INFO L225 Difference]: With dead ends: 16988 [2021-06-05 13:46:55,919 INFO L226 Difference]: Without dead ends: 16820 [2021-06-05 13:46:55,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 529.6ms TimeCoverageRelationStatistics Valid=321, Invalid=2649, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 13:46:55,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16820 states. [2021-06-05 13:46:56,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16820 to 12541. [2021-06-05 13:46:56,111 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 13:46:56,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12541 states to 12541 states and 32944 transitions. [2021-06-05 13:46:56,132 INFO L78 Accepts]: Start accepts. Automaton has 12541 states and 32944 transitions. Word has length 53 [2021-06-05 13:46:56,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:56,132 INFO L482 AbstractCegarLoop]: Abstraction has 12541 states and 32944 transitions. [2021-06-05 13:46:56,132 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 13:46:56,132 INFO L276 IsEmpty]: Start isEmpty. Operand 12541 states and 32944 transitions. [2021-06-05 13:46:56,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:56,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:56,140 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 13:46:56,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable793,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:56,341 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:56,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:56,341 INFO L82 PathProgramCache]: Analyzing trace with hash 705591991, now seen corresponding path program 227 times [2021-06-05 13:46:56,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:56,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322226352] [2021-06-05 13:46:56,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:56,427 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 13:46:56,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:56,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322226352] [2021-06-05 13:46:56,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322226352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:56,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433480956] [2021-06-05 13:46:56,427 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 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 13:46:56,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 13:46:56,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:56,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:56,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:56,623 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 13:46:56,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433480956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:56,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:56,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-06-05 13:46:56,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467863683] [2021-06-05 13:46:56,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:46:56,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:56,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:46:56,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:46:56,624 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 13:46:56,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:56,881 INFO L93 Difference]: Finished difference Result 14864 states and 37234 transitions. [2021-06-05 13:46:56,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:46:56,881 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 13:46:56,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:56,898 INFO L225 Difference]: With dead ends: 14864 [2021-06-05 13:46:56,898 INFO L226 Difference]: Without dead ends: 14837 [2021-06-05 13:46:56,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:46:56,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14837 states. [2021-06-05 13:46:57,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14837 to 12541. [2021-06-05 13:46:57,071 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 13:46:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12541 states to 12541 states and 32941 transitions. [2021-06-05 13:46:57,093 INFO L78 Accepts]: Start accepts. Automaton has 12541 states and 32941 transitions. Word has length 53 [2021-06-05 13:46:57,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:57,093 INFO L482 AbstractCegarLoop]: Abstraction has 12541 states and 32941 transitions. [2021-06-05 13:46:57,093 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 13:46:57,093 INFO L276 IsEmpty]: Start isEmpty. Operand 12541 states and 32941 transitions. [2021-06-05 13:46:57,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:57,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:57,101 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 13:46:57,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-06-05 13:46:57,301 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:57,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:57,301 INFO L82 PathProgramCache]: Analyzing trace with hash 259297804, now seen corresponding path program 228 times [2021-06-05 13:46:57,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:57,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006585372] [2021-06-05 13:46:57,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:57,422 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 13:46:57,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:57,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006585372] [2021-06-05 13:46:57,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006585372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:57,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456492078] [2021-06-05 13:46:57,422 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 13:46:57,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 13:46:57,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:57,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:46:57,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:57,531 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 13:46:57,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456492078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:57,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:57,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:46:57,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354387404] [2021-06-05 13:46:57,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:57,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:57,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:57,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:57,532 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 13:46:59,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:59,279 INFO L93 Difference]: Finished difference Result 23524 states and 56000 transitions. [2021-06-05 13:46:59,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 13:46:59,280 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 13:46:59,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:59,306 INFO L225 Difference]: With dead ends: 23524 [2021-06-05 13:46:59,306 INFO L226 Difference]: Without dead ends: 23068 [2021-06-05 13:46:59,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3318 ImplicationChecksByTransitivity, 1081.4ms TimeCoverageRelationStatistics Valid=807, Invalid=8123, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 13:46:59,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23068 states. [2021-06-05 13:46:59,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23068 to 13305. [2021-06-05 13:46:59,526 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 13:46:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13305 states to 13305 states and 34759 transitions. [2021-06-05 13:46:59,549 INFO L78 Accepts]: Start accepts. Automaton has 13305 states and 34759 transitions. Word has length 53 [2021-06-05 13:46:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:59,549 INFO L482 AbstractCegarLoop]: Abstraction has 13305 states and 34759 transitions. [2021-06-05 13:46:59,549 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 13:46:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 13305 states and 34759 transitions. [2021-06-05 13:46:59,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:46:59,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:59,557 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 13:46:59,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:59,758 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:59,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:59,758 INFO L82 PathProgramCache]: Analyzing trace with hash -2142096623, now seen corresponding path program 229 times [2021-06-05 13:46:59,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:59,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000519231] [2021-06-05 13:46:59,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:59,858 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 13:46:59,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:59,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000519231] [2021-06-05 13:46:59,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000519231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:59,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739037547] [2021-06-05 13:46:59,859 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 13:46:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:59,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:46:59,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:00,038 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 13:47:00,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739037547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:00,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:00,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 13:47:00,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158921119] [2021-06-05 13:47:00,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:47:00,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:00,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:47:00,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:47:00,038 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 13:47:00,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:00,265 INFO L93 Difference]: Finished difference Result 15631 states and 39032 transitions. [2021-06-05 13:47:00,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:47:00,266 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 13:47:00,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:00,282 INFO L225 Difference]: With dead ends: 15631 [2021-06-05 13:47:00,282 INFO L226 Difference]: Without dead ends: 15595 [2021-06-05 13:47:00,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:47:00,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15595 states. [2021-06-05 13:47:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15595 to 13305. [2021-06-05 13:47:00,448 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 13:47:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13305 states to 13305 states and 34756 transitions. [2021-06-05 13:47:00,468 INFO L78 Accepts]: Start accepts. Automaton has 13305 states and 34756 transitions. Word has length 53 [2021-06-05 13:47:00,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:00,468 INFO L482 AbstractCegarLoop]: Abstraction has 13305 states and 34756 transitions. [2021-06-05 13:47:00,468 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 13:47:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 13305 states and 34756 transitions. [2021-06-05 13:47:00,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:47:00,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:00,476 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 13:47:00,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable800 [2021-06-05 13:47:00,676 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:00,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:00,676 INFO L82 PathProgramCache]: Analyzing trace with hash 105983938, now seen corresponding path program 230 times [2021-06-05 13:47:00,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:00,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120411779] [2021-06-05 13:47:00,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:00,788 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 13:47:00,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:00,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120411779] [2021-06-05 13:47:00,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120411779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:00,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432849930] [2021-06-05 13:47:00,788 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 13:47:00,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:00,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:00,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:47:00,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:00,892 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 13:47:00,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432849930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:00,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:00,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:47:00,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947336886] [2021-06-05 13:47:00,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:47:00,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:00,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:47:00,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:47:00,893 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 13:47:03,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:03,876 INFO L93 Difference]: Finished difference Result 39717 states and 90677 transitions. [2021-06-05 13:47:03,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-06-05 13:47:03,876 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 13:47:03,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:03,921 INFO L225 Difference]: With dead ends: 39717 [2021-06-05 13:47:03,921 INFO L226 Difference]: Without dead ends: 38331 [2021-06-05 13:47:03,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10453 ImplicationChecksByTransitivity, 2186.7ms TimeCoverageRelationStatistics Valid=1941, Invalid=23181, Unknown=0, NotChecked=0, Total=25122 [2021-06-05 13:47:03,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38331 states. [2021-06-05 13:47:04,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38331 to 14578. [2021-06-05 13:47:04,228 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 13:47:04,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14578 states to 14578 states and 37789 transitions. [2021-06-05 13:47:04,250 INFO L78 Accepts]: Start accepts. Automaton has 14578 states and 37789 transitions. Word has length 53 [2021-06-05 13:47:04,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:04,251 INFO L482 AbstractCegarLoop]: Abstraction has 14578 states and 37789 transitions. [2021-06-05 13:47:04,251 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 13:47:04,251 INFO L276 IsEmpty]: Start isEmpty. Operand 14578 states and 37789 transitions. [2021-06-05 13:47:04,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:47:04,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:04,259 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 13:47:04,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:04,459 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:04,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:04,459 INFO L82 PathProgramCache]: Analyzing trace with hash 855401591, now seen corresponding path program 231 times [2021-06-05 13:47:04,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:04,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804832620] [2021-06-05 13:47:04,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:04,579 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 13:47:04,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:04,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804832620] [2021-06-05 13:47:04,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804832620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:04,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697237502] [2021-06-05 13:47:04,579 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 13:47:04,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 13:47:04,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:04,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:47:04,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:04,690 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 13:47:04,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697237502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:04,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:04,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 13:47:04,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592388238] [2021-06-05 13:47:04,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:47:04,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:04,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:47:04,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:47:04,691 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 13:47:04,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:04,934 INFO L93 Difference]: Finished difference Result 17260 states and 42750 transitions. [2021-06-05 13:47:04,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:47:04,934 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 13:47:04,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:04,955 INFO L225 Difference]: With dead ends: 17260 [2021-06-05 13:47:04,955 INFO L226 Difference]: Without dead ends: 17215 [2021-06-05 13:47:04,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:47:04,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17215 states. [2021-06-05 13:47:05,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17215 to 14578. [2021-06-05 13:47:05,151 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 13:47:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14578 states to 14578 states and 37786 transitions. [2021-06-05 13:47:05,176 INFO L78 Accepts]: Start accepts. Automaton has 14578 states and 37786 transitions. Word has length 53 [2021-06-05 13:47:05,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:05,176 INFO L482 AbstractCegarLoop]: Abstraction has 14578 states and 37786 transitions. [2021-06-05 13:47:05,176 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 13:47:05,176 INFO L276 IsEmpty]: Start isEmpty. Operand 14578 states and 37786 transitions. [2021-06-05 13:47:05,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:47:05,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:05,185 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 13:47:05,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable807 [2021-06-05 13:47:05,385 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:05,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:05,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1717162420, now seen corresponding path program 232 times [2021-06-05 13:47:05,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:05,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014258565] [2021-06-05 13:47:05,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:05,515 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 13:47:05,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:05,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014258565] [2021-06-05 13:47:05,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014258565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:05,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621508038] [2021-06-05 13:47:05,516 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 13:47:05,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:05,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:05,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 13:47:05,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:05,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 13:47:05,718 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 13:47:05,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:47:05,721 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 13:47:05,721 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 13:47:05,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:47:05,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 13:47:05,728 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 13:47:05,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621508038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:05,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:05,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 13:47:05,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563861315] [2021-06-05 13:47:05,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:05,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:05,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:05,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:05,729 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 13:47:10,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:10,877 INFO L93 Difference]: Finished difference Result 44078 states and 101715 transitions. [2021-06-05 13:47:10,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2021-06-05 13:47:10,877 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 13:47:10,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:10,920 INFO L225 Difference]: With dead ends: 44078 [2021-06-05 13:47:10,920 INFO L226 Difference]: Without dead ends: 42758 [2021-06-05 13:47:10,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28740 ImplicationChecksByTransitivity, 4184.9ms TimeCoverageRelationStatistics Valid=4371, Invalid=60399, Unknown=0, NotChecked=0, Total=64770 [2021-06-05 13:47:10,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42758 states. [2021-06-05 13:47:11,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42758 to 16260. [2021-06-05 13:47:11,232 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 13:47:11,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16260 states to 16260 states and 41923 transitions. [2021-06-05 13:47:11,257 INFO L78 Accepts]: Start accepts. Automaton has 16260 states and 41923 transitions. Word has length 53 [2021-06-05 13:47:11,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:11,257 INFO L482 AbstractCegarLoop]: Abstraction has 16260 states and 41923 transitions. [2021-06-05 13:47:11,257 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 13:47:11,257 INFO L276 IsEmpty]: Start isEmpty. Operand 16260 states and 41923 transitions. [2021-06-05 13:47:11,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:47:11,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:11,266 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 13:47:11,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable814,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:11,466 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:11,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:11,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1635323567, now seen corresponding path program 233 times [2021-06-05 13:47:11,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:11,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601003593] [2021-06-05 13:47:11,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:11,585 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 13:47:11,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:11,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601003593] [2021-06-05 13:47:11,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601003593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:11,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547642309] [2021-06-05 13:47:11,585 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 13:47:11,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 13:47:11,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:11,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:47:11,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:11,728 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 13:47:11,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547642309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:11,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:11,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 18 [2021-06-05 13:47:11,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247877403] [2021-06-05 13:47:11,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:11,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:11,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:11,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:11,729 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 13:47:12,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:12,077 INFO L93 Difference]: Finished difference Result 19781 states and 48513 transitions. [2021-06-05 13:47:12,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:47:12,077 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 13:47:12,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:12,108 INFO L225 Difference]: With dead ends: 19781 [2021-06-05 13:47:12,108 INFO L226 Difference]: Without dead ends: 19727 [2021-06-05 13:47:12,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:47:12,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19727 states. [2021-06-05 13:47:12,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19727 to 16260. [2021-06-05 13:47:12,318 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 13:47:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16260 states to 16260 states and 41920 transitions. [2021-06-05 13:47:12,344 INFO L78 Accepts]: Start accepts. Automaton has 16260 states and 41920 transitions. Word has length 53 [2021-06-05 13:47:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:12,344 INFO L482 AbstractCegarLoop]: Abstraction has 16260 states and 41920 transitions. [2021-06-05 13:47:12,344 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 13:47:12,344 INFO L276 IsEmpty]: Start isEmpty. Operand 16260 states and 41920 transitions. [2021-06-05 13:47:12,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:47:12,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:12,353 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 13:47:12,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable815 [2021-06-05 13:47:12,553 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:12,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:12,554 INFO L82 PathProgramCache]: Analyzing trace with hash -913888382, now seen corresponding path program 234 times [2021-06-05 13:47:12,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:12,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197891099] [2021-06-05 13:47:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:12,692 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 13:47:12,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:12,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197891099] [2021-06-05 13:47:12,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197891099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:12,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563626062] [2021-06-05 13:47:12,692 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 13:47:12,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 13:47:12,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:12,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:47:12,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:12,799 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 13:47:12,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563626062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:12,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:12,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 13:47:12,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948618158] [2021-06-05 13:47:12,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:47:12,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:12,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:47:12,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:47:12,800 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 13:47:13,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:13,577 INFO L93 Difference]: Finished difference Result 21764 states and 52143 transitions. [2021-06-05 13:47:13,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:47:13,578 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 13:47:13,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:13,601 INFO L225 Difference]: With dead ends: 21764 [2021-06-05 13:47:13,601 INFO L226 Difference]: Without dead ends: 19982 [2021-06-05 13:47:13,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 404.1ms TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:47:13,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19982 states. [2021-06-05 13:47:13,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19982 to 11673. [2021-06-05 13:47:13,759 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 13:47:13,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11673 states to 11673 states and 30858 transitions. [2021-06-05 13:47:13,778 INFO L78 Accepts]: Start accepts. Automaton has 11673 states and 30858 transitions. Word has length 53 [2021-06-05 13:47:13,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:13,778 INFO L482 AbstractCegarLoop]: Abstraction has 11673 states and 30858 transitions. [2021-06-05 13:47:13,778 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 13:47:13,778 INFO L276 IsEmpty]: Start isEmpty. Operand 11673 states and 30858 transitions. [2021-06-05 13:47:13,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:47:13,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:13,784 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 13:47:13,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable823,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:13,985 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:13,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:13,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1151949899, now seen corresponding path program 109 times [2021-06-05 13:47:13,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:13,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701774166] [2021-06-05 13:47:13,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:14,055 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 13:47:14,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:14,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701774166] [2021-06-05 13:47:14,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701774166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:14,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213375373] [2021-06-05 13:47:14,055 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 13:47:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:14,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:47:14,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:14,174 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 13:47:14,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213375373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:14,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:14,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-06-05 13:47:14,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920172156] [2021-06-05 13:47:14,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:47:14,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:14,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:47:14,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:47:14,175 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 13:47:14,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:14,375 INFO L93 Difference]: Finished difference Result 13241 states and 34204 transitions. [2021-06-05 13:47:14,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:47:14,376 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 13:47:14,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:14,390 INFO L225 Difference]: With dead ends: 13241 [2021-06-05 13:47:14,390 INFO L226 Difference]: Without dead ends: 13227 [2021-06-05 13:47:14,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:47:14,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13227 states. [2021-06-05 13:47:14,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13227 to 12216. [2021-06-05 13:47:14,533 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 13:47:14,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12216 states to 12216 states and 32304 transitions. [2021-06-05 13:47:14,552 INFO L78 Accepts]: Start accepts. Automaton has 12216 states and 32304 transitions. Word has length 53 [2021-06-05 13:47:14,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:14,552 INFO L482 AbstractCegarLoop]: Abstraction has 12216 states and 32304 transitions. [2021-06-05 13:47:14,552 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 13:47:14,552 INFO L276 IsEmpty]: Start isEmpty. Operand 12216 states and 32304 transitions. [2021-06-05 13:47:14,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:47:14,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:14,559 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 13:47:14,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable824,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:14,759 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:14,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:14,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1773830309, now seen corresponding path program 110 times [2021-06-05 13:47:14,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:14,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420686128] [2021-06-05 13:47:14,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:14,829 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 13:47:14,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:14,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420686128] [2021-06-05 13:47:14,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420686128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:14,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170434418] [2021-06-05 13:47:14,829 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 13:47:14,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:14,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:14,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:47:14,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:14,938 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 13:47:14,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170434418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:14,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:14,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 13:47:14,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088337960] [2021-06-05 13:47:14,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:47:14,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:14,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:47:14,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:47:14,939 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 13:47:15,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:15,221 INFO L93 Difference]: Finished difference Result 14309 states and 36490 transitions. [2021-06-05 13:47:15,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:47:15,222 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 13:47:15,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:15,239 INFO L225 Difference]: With dead ends: 14309 [2021-06-05 13:47:15,239 INFO L226 Difference]: Without dead ends: 14309 [2021-06-05 13:47:15,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:15,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14309 states. [2021-06-05 13:47:15,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14309 to 12222. [2021-06-05 13:47:15,395 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 13:47:15,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12222 states to 12222 states and 32323 transitions. [2021-06-05 13:47:15,413 INFO L78 Accepts]: Start accepts. Automaton has 12222 states and 32323 transitions. Word has length 53 [2021-06-05 13:47:15,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:15,413 INFO L482 AbstractCegarLoop]: Abstraction has 12222 states and 32323 transitions. [2021-06-05 13:47:15,413 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 13:47:15,413 INFO L276 IsEmpty]: Start isEmpty. Operand 12222 states and 32323 transitions. [2021-06-05 13:47:15,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:47:15,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:15,420 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 13:47:15,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable827,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:15,620 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:15,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:15,620 INFO L82 PathProgramCache]: Analyzing trace with hash 883564531, now seen corresponding path program 111 times [2021-06-05 13:47:15,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:15,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181063016] [2021-06-05 13:47:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:15,700 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 13:47:15,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:15,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181063016] [2021-06-05 13:47:15,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181063016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:15,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851740184] [2021-06-05 13:47:15,700 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 13:47:15,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 13:47:15,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:15,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:47:15,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:15,834 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 13:47:15,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851740184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:15,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:15,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-06-05 13:47:15,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904146324] [2021-06-05 13:47:15,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:47:15,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:15,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:47:15,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:47:15,835 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 13:47:16,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:16,286 INFO L93 Difference]: Finished difference Result 13621 states and 34955 transitions. [2021-06-05 13:47:16,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:47:16,286 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 13:47:16,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:16,302 INFO L225 Difference]: With dead ends: 13621 [2021-06-05 13:47:16,302 INFO L226 Difference]: Without dead ends: 13621 [2021-06-05 13:47:16,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 255.3ms TimeCoverageRelationStatistics Valid=324, Invalid=546, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:47:16,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13621 states. [2021-06-05 13:47:16,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13621 to 12015. [2021-06-05 13:47:16,480 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 13:47:16,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12015 states to 12015 states and 31806 transitions. [2021-06-05 13:47:16,501 INFO L78 Accepts]: Start accepts. Automaton has 12015 states and 31806 transitions. Word has length 53 [2021-06-05 13:47:16,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:16,501 INFO L482 AbstractCegarLoop]: Abstraction has 12015 states and 31806 transitions. [2021-06-05 13:47:16,501 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 13:47:16,501 INFO L276 IsEmpty]: Start isEmpty. Operand 12015 states and 31806 transitions. [2021-06-05 13:47:16,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 13:47:16,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:16,509 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 13:47:16,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:16,709 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:16,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:16,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1321467447, now seen corresponding path program 235 times [2021-06-05 13:47:16,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:16,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686840166] [2021-06-05 13:47:16,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:16,844 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 13:47:16,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:16,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686840166] [2021-06-05 13:47:16,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686840166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:16,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291788713] [2021-06-05 13:47:16,844 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 13:47:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:16,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:47:16,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:16,954 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 13:47:16,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291788713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:16,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:16,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 13:47:16,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920178275] [2021-06-05 13:47:16,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:47:16,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:16,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:47:16,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:47:16,955 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 13:47:17,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:17,273 INFO L93 Difference]: Finished difference Result 13804 states and 35062 transitions. [2021-06-05 13:47:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:47:17,273 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 13:47:17,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:17,289 INFO L225 Difference]: With dead ends: 13804 [2021-06-05 13:47:17,289 INFO L226 Difference]: Without dead ends: 13739 [2021-06-05 13:47:17,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:47:17,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13739 states. [2021-06-05 13:47:17,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13739 to 12024. [2021-06-05 13:47:17,440 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 13:47:17,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12024 states to 12024 states and 31820 transitions. [2021-06-05 13:47:17,459 INFO L78 Accepts]: Start accepts. Automaton has 12024 states and 31820 transitions. Word has length 53 [2021-06-05 13:47:17,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:17,459 INFO L482 AbstractCegarLoop]: Abstraction has 12024 states and 31820 transitions. [2021-06-05 13:47:17,459 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 13:47:17,459 INFO L276 IsEmpty]: Start isEmpty. Operand 12024 states and 31820 transitions. [2021-06-05 13:47:17,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 13:47:17,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:17,467 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 13:47:17,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable831 [2021-06-05 13:47:17,667 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:17,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:17,667 INFO L82 PathProgramCache]: Analyzing trace with hash -278189192, now seen corresponding path program 236 times [2021-06-05 13:47:17,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:17,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993922727] [2021-06-05 13:47:17,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:17,737 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 13:47:17,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:17,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993922727] [2021-06-05 13:47:17,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993922727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:17,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662616240] [2021-06-05 13:47:17,737 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 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 13:47:17,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:17,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:17,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:47:17,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:18,100 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 13:47:18,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662616240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:18,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:18,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17] total 25 [2021-06-05 13:47:18,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215993675] [2021-06-05 13:47:18,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:47:18,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:18,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:47:18,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:47:18,100 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 13:47:19,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:19,654 INFO L93 Difference]: Finished difference Result 15072 states and 37802 transitions. [2021-06-05 13:47:19,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 13:47:19,654 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 13:47:19,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:19,672 INFO L225 Difference]: With dead ends: 15072 [2021-06-05 13:47:19,672 INFO L226 Difference]: Without dead ends: 15028 [2021-06-05 13:47:19,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 891.6ms TimeCoverageRelationStatistics Valid=786, Invalid=3246, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 13:47:19,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15028 states. [2021-06-05 13:47:19,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15028 to 12811. [2021-06-05 13:47:19,873 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 13:47:19,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12811 states to 12811 states and 33434 transitions. [2021-06-05 13:47:19,893 INFO L78 Accepts]: Start accepts. Automaton has 12811 states and 33434 transitions. Word has length 56 [2021-06-05 13:47:19,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:19,894 INFO L482 AbstractCegarLoop]: Abstraction has 12811 states and 33434 transitions. [2021-06-05 13:47:19,894 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 13:47:19,894 INFO L276 IsEmpty]: Start isEmpty. Operand 12811 states and 33434 transitions. [2021-06-05 13:47:19,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 13:47:19,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:19,902 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 13:47:20,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-06-05 13:47:20,102 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:20,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:20,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1678028872, now seen corresponding path program 237 times [2021-06-05 13:47:20,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:20,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563014897] [2021-06-05 13:47:20,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:20,173 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 13:47:20,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:20,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563014897] [2021-06-05 13:47:20,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563014897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:20,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368476725] [2021-06-05 13:47:20,174 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 13:47:20,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 13:47:20,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:20,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:47:20,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:20,396 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 13:47:20,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368476725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:20,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:20,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 13:47:20,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047299100] [2021-06-05 13:47:20,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:20,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:20,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:20,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:20,397 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 13:47:21,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:21,374 INFO L93 Difference]: Finished difference Result 16926 states and 41264 transitions. [2021-06-05 13:47:21,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:47:21,374 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 13:47:21,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:21,394 INFO L225 Difference]: With dead ends: 16926 [2021-06-05 13:47:21,394 INFO L226 Difference]: Without dead ends: 16834 [2021-06-05 13:47:21,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 429.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 13:47:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16834 states. [2021-06-05 13:47:21,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16834 to 12990. [2021-06-05 13:47:21,569 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 13:47:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12990 states to 12990 states and 33892 transitions. [2021-06-05 13:47:21,589 INFO L78 Accepts]: Start accepts. Automaton has 12990 states and 33892 transitions. Word has length 56 [2021-06-05 13:47:21,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:21,589 INFO L482 AbstractCegarLoop]: Abstraction has 12990 states and 33892 transitions. [2021-06-05 13:47:21,589 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 13:47:21,589 INFO L276 IsEmpty]: Start isEmpty. Operand 12990 states and 33892 transitions. [2021-06-05 13:47:21,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 13:47:21,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:21,597 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 13:47:21,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable841 [2021-06-05 13:47:21,798 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:21,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:21,798 INFO L82 PathProgramCache]: Analyzing trace with hash 173585170, now seen corresponding path program 238 times [2021-06-05 13:47:21,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:21,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249905666] [2021-06-05 13:47:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:21,863 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 13:47:21,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:21,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249905666] [2021-06-05 13:47:21,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249905666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:21,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234216188] [2021-06-05 13:47:21,864 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 13:47:21,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:21,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:21,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:47:21,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:21,963 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 13:47:21,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234216188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:21,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:21,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:47:21,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652710919] [2021-06-05 13:47:21,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:47:21,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:21,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:47:21,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:47:21,964 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 13:47:22,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:22,302 INFO L93 Difference]: Finished difference Result 14078 states and 35927 transitions. [2021-06-05 13:47:22,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:47:22,303 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 13:47:22,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:22,318 INFO L225 Difference]: With dead ends: 14078 [2021-06-05 13:47:22,318 INFO L226 Difference]: Without dead ends: 14012 [2021-06-05 13:47:22,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:47:22,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14012 states. [2021-06-05 13:47:22,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14012 to 13057. [2021-06-05 13:47:22,465 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 13:47:22,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13057 states to 13057 states and 34005 transitions. [2021-06-05 13:47:22,485 INFO L78 Accepts]: Start accepts. Automaton has 13057 states and 34005 transitions. Word has length 56 [2021-06-05 13:47:22,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:22,486 INFO L482 AbstractCegarLoop]: Abstraction has 13057 states and 34005 transitions. [2021-06-05 13:47:22,486 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 13:47:22,486 INFO L276 IsEmpty]: Start isEmpty. Operand 13057 states and 34005 transitions. [2021-06-05 13:47:22,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 13:47:22,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:22,494 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 13:47:22,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable842 [2021-06-05 13:47:22,694 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:22,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:22,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1342527864, now seen corresponding path program 239 times [2021-06-05 13:47:22,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:22,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628458704] [2021-06-05 13:47:22,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:22,771 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 13:47:22,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:22,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628458704] [2021-06-05 13:47:22,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628458704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:22,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555793807] [2021-06-05 13:47:22,772 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 13:47:22,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 13:47:22,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:22,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:47:22,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:22,903 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 13:47:22,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555793807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:22,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:22,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:47:22,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520597800] [2021-06-05 13:47:22,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:47:22,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:22,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:47:22,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:47:22,904 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 13:47:23,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:23,332 INFO L93 Difference]: Finished difference Result 14112 states and 36011 transitions. [2021-06-05 13:47:23,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:47:23,332 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 13:47:23,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:23,348 INFO L225 Difference]: With dead ends: 14112 [2021-06-05 13:47:23,348 INFO L226 Difference]: Without dead ends: 14074 [2021-06-05 13:47:23,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:47:23,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14074 states. [2021-06-05 13:47:23,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14074 to 13111. [2021-06-05 13:47:23,507 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 13:47:23,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13111 states to 13111 states and 34101 transitions. [2021-06-05 13:47:23,527 INFO L78 Accepts]: Start accepts. Automaton has 13111 states and 34101 transitions. Word has length 56 [2021-06-05 13:47:23,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:23,527 INFO L482 AbstractCegarLoop]: Abstraction has 13111 states and 34101 transitions. [2021-06-05 13:47:23,527 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 13:47:23,528 INFO L276 IsEmpty]: Start isEmpty. Operand 13111 states and 34101 transitions. [2021-06-05 13:47:23,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 13:47:23,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:23,535 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 13:47:23,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable843,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:23,736 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:23,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:23,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1719488850, now seen corresponding path program 240 times [2021-06-05 13:47:23,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:23,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49739747] [2021-06-05 13:47:23,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:23,803 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 13:47:23,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:23,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49739747] [2021-06-05 13:47:23,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49739747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:23,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056167824] [2021-06-05 13:47:23,803 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 13:47:23,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 13:47:23,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:23,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:47:23,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:24,026 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 13:47:24,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056167824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:24,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:24,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 13:47:24,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795404048] [2021-06-05 13:47:24,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:24,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:24,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:24,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:24,027 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 13:47:25,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:25,075 INFO L93 Difference]: Finished difference Result 18611 states and 44534 transitions. [2021-06-05 13:47:25,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:47:25,075 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 13:47:25,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:25,099 INFO L225 Difference]: With dead ends: 18611 [2021-06-05 13:47:25,099 INFO L226 Difference]: Without dead ends: 18544 [2021-06-05 13:47:25,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 434.2ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 13:47:25,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18544 states. [2021-06-05 13:47:25,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18544 to 13170. [2021-06-05 13:47:25,300 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 13:47:25,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13170 states to 13170 states and 34227 transitions. [2021-06-05 13:47:25,321 INFO L78 Accepts]: Start accepts. Automaton has 13170 states and 34227 transitions. Word has length 56 [2021-06-05 13:47:25,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:25,321 INFO L482 AbstractCegarLoop]: Abstraction has 13170 states and 34227 transitions. [2021-06-05 13:47:25,321 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 13:47:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 13170 states and 34227 transitions. [2021-06-05 13:47:25,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 13:47:25,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:25,330 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 13:47:25,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-06-05 13:47:25,530 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:25,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:25,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1774337938, now seen corresponding path program 241 times [2021-06-05 13:47:25,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:25,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409241037] [2021-06-05 13:47:25,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:25,598 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 13:47:25,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:25,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409241037] [2021-06-05 13:47:25,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409241037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:25,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650517657] [2021-06-05 13:47:25,598 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 13:47:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:25,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:47:25,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:25,699 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 13:47:25,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650517657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:25,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:25,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 13:47:25,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754559082] [2021-06-05 13:47:25,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:47:25,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:25,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:47:25,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:47:25,700 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 13:47:26,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:26,048 INFO L93 Difference]: Finished difference Result 14386 states and 36601 transitions. [2021-06-05 13:47:26,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:47:26,048 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 13:47:26,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:26,065 INFO L225 Difference]: With dead ends: 14386 [2021-06-05 13:47:26,065 INFO L226 Difference]: Without dead ends: 14350 [2021-06-05 13:47:26,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:47:26,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14350 states. [2021-06-05 13:47:26,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14350 to 13369. [2021-06-05 13:47:26,272 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 13:47:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13369 states to 13369 states and 34624 transitions. [2021-06-05 13:47:26,293 INFO L78 Accepts]: Start accepts. Automaton has 13369 states and 34624 transitions. Word has length 56 [2021-06-05 13:47:26,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:26,294 INFO L482 AbstractCegarLoop]: Abstraction has 13369 states and 34624 transitions. [2021-06-05 13:47:26,294 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 13:47:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand 13369 states and 34624 transitions. [2021-06-05 13:47:26,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 13:47:26,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:26,303 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 13:47:26,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:26,503 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:26,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:26,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1948615432, now seen corresponding path program 242 times [2021-06-05 13:47:26,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:26,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368545816] [2021-06-05 13:47:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:26,569 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 13:47:26,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:26,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368545816] [2021-06-05 13:47:26,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368545816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:26,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330113682] [2021-06-05 13:47:26,570 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 13:47:26,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:26,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:26,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:47:26,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:26,796 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 13:47:26,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330113682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:26,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:26,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 13:47:26,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447910677] [2021-06-05 13:47:26,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:26,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:26,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:26,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:26,797 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 13:47:27,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:27,866 INFO L93 Difference]: Finished difference Result 18830 states and 45148 transitions. [2021-06-05 13:47:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:47:27,866 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 13:47:27,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:27,889 INFO L225 Difference]: With dead ends: 18830 [2021-06-05 13:47:27,889 INFO L226 Difference]: Without dead ends: 18792 [2021-06-05 13:47:27,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 460.0ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 13:47:27,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18792 states. [2021-06-05 13:47:28,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18792 to 14037. [2021-06-05 13:47:28,058 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 13:47:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14037 states to 14037 states and 36344 transitions. [2021-06-05 13:47:28,079 INFO L78 Accepts]: Start accepts. Automaton has 14037 states and 36344 transitions. Word has length 56 [2021-06-05 13:47:28,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:28,079 INFO L482 AbstractCegarLoop]: Abstraction has 14037 states and 36344 transitions. [2021-06-05 13:47:28,079 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 13:47:28,079 INFO L276 IsEmpty]: Start isEmpty. Operand 14037 states and 36344 transitions. [2021-06-05 13:47:28,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:28,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:28,088 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 13:47:28,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable846,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:28,288 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:28,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:28,288 INFO L82 PathProgramCache]: Analyzing trace with hash -848422539, now seen corresponding path program 112 times [2021-06-05 13:47:28,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:28,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559821532] [2021-06-05 13:47:28,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:28,458 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 13:47:28,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:28,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559821532] [2021-06-05 13:47:28,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559821532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:28,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243318298] [2021-06-05 13:47:28,459 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 13:47:28,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:28,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:28,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:47:28,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:28,572 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 13:47:28,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243318298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:28,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:28,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-05 13:47:28,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339473409] [2021-06-05 13:47:28,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:47:28,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:28,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:47:28,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:28,573 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 13:47:29,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:29,597 INFO L93 Difference]: Finished difference Result 17404 states and 43003 transitions. [2021-06-05 13:47:29,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:47:29,597 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 13:47:29,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:29,617 INFO L225 Difference]: With dead ends: 17404 [2021-06-05 13:47:29,617 INFO L226 Difference]: Without dead ends: 17123 [2021-06-05 13:47:29,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 513.5ms TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:47:29,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17123 states. [2021-06-05 13:47:29,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17123 to 13513. [2021-06-05 13:47:29,823 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 13:47:29,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13513 states to 13513 states and 35029 transitions. [2021-06-05 13:47:29,844 INFO L78 Accepts]: Start accepts. Automaton has 13513 states and 35029 transitions. Word has length 59 [2021-06-05 13:47:29,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:29,844 INFO L482 AbstractCegarLoop]: Abstraction has 13513 states and 35029 transitions. [2021-06-05 13:47:29,844 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 13:47:29,844 INFO L276 IsEmpty]: Start isEmpty. Operand 13513 states and 35029 transitions. [2021-06-05 13:47:29,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:29,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:29,853 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 13:47:30,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable847 [2021-06-05 13:47:30,054 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:30,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:30,054 INFO L82 PathProgramCache]: Analyzing trace with hash 917417269, now seen corresponding path program 243 times [2021-06-05 13:47:30,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:30,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245177374] [2021-06-05 13:47:30,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:30,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:30,237 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 13:47:30,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:30,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245177374] [2021-06-05 13:47:30,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245177374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:30,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714314587] [2021-06-05 13:47:30,238 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 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 13:47:30,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 13:47:30,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:30,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:47:30,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:30,594 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 13:47:30,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714314587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:30,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:30,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:47:30,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194122578] [2021-06-05 13:47:30,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:47:30,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:30,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:47:30,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:47:30,594 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 13:47:31,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:31,945 INFO L93 Difference]: Finished difference Result 13861 states and 35583 transitions. [2021-06-05 13:47:31,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:47:31,945 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 13:47:31,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:31,961 INFO L225 Difference]: With dead ends: 13861 [2021-06-05 13:47:31,961 INFO L226 Difference]: Without dead ends: 13757 [2021-06-05 13:47:31,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 350.7ms TimeCoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:47:31,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13757 states. [2021-06-05 13:47:32,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13757 to 13513. [2021-06-05 13:47:32,113 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 13:47:32,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13513 states to 13513 states and 34979 transitions. [2021-06-05 13:47:32,134 INFO L78 Accepts]: Start accepts. Automaton has 13513 states and 34979 transitions. Word has length 59 [2021-06-05 13:47:32,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:32,134 INFO L482 AbstractCegarLoop]: Abstraction has 13513 states and 34979 transitions. [2021-06-05 13:47:32,134 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 13:47:32,134 INFO L276 IsEmpty]: Start isEmpty. Operand 13513 states and 34979 transitions. [2021-06-05 13:47:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:32,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:32,144 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 13:47:32,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable848,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:32,344 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:32,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:32,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1852033535, now seen corresponding path program 244 times [2021-06-05 13:47:32,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:32,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906203785] [2021-06-05 13:47:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:32,437 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 13:47:32,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:32,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906203785] [2021-06-05 13:47:32,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906203785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:32,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333542932] [2021-06-05 13:47:32,438 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 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 13:47:32,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:32,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:32,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:47:32,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:32,551 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 13:47:32,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333542932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:32,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:32,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:47:32,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153840687] [2021-06-05 13:47:32,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:47:32,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:32,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:47:32,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:47:32,552 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 13:47:33,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:33,008 INFO L93 Difference]: Finished difference Result 14176 states and 36253 transitions. [2021-06-05 13:47:33,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:47:33,008 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 13:47:33,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:33,023 INFO L225 Difference]: With dead ends: 14176 [2021-06-05 13:47:33,023 INFO L226 Difference]: Without dead ends: 14176 [2021-06-05 13:47:33,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 150.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:33,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14176 states. [2021-06-05 13:47:33,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14176 to 13534. [2021-06-05 13:47:33,171 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 13:47:33,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13534 states to 13534 states and 35043 transitions. [2021-06-05 13:47:33,266 INFO L78 Accepts]: Start accepts. Automaton has 13534 states and 35043 transitions. Word has length 59 [2021-06-05 13:47:33,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:33,266 INFO L482 AbstractCegarLoop]: Abstraction has 13534 states and 35043 transitions. [2021-06-05 13:47:33,266 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 13:47:33,266 INFO L276 IsEmpty]: Start isEmpty. Operand 13534 states and 35043 transitions. [2021-06-05 13:47:33,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:33,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:33,276 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 13:47:33,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable849,407 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:33,476 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:33,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:33,477 INFO L82 PathProgramCache]: Analyzing trace with hash -267823288, now seen corresponding path program 113 times [2021-06-05 13:47:33,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:33,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279287036] [2021-06-05 13:47:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:33,568 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 13:47:33,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:33,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279287036] [2021-06-05 13:47:33,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279287036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:33,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564563765] [2021-06-05 13:47:33,568 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 13:47:33,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 13:47:33,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:33,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:47:33,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:33,733 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 13:47:33,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564563765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:33,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:33,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-05 13:47:33,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606574442] [2021-06-05 13:47:33,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:47:33,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:33,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:47:33,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:47:33,733 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 13:47:33,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:33,964 INFO L93 Difference]: Finished difference Result 19967 states and 49349 transitions. [2021-06-05 13:47:33,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:47:33,965 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 13:47:33,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:33,986 INFO L225 Difference]: With dead ends: 19967 [2021-06-05 13:47:33,986 INFO L226 Difference]: Without dead ends: 19967 [2021-06-05 13:47:33,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:34,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19967 states. [2021-06-05 13:47:34,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19967 to 14829. [2021-06-05 13:47:34,175 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 13:47:34,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14829 states to 14829 states and 38932 transitions. [2021-06-05 13:47:34,199 INFO L78 Accepts]: Start accepts. Automaton has 14829 states and 38932 transitions. Word has length 59 [2021-06-05 13:47:34,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:34,199 INFO L482 AbstractCegarLoop]: Abstraction has 14829 states and 38932 transitions. [2021-06-05 13:47:34,199 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 13:47:34,199 INFO L276 IsEmpty]: Start isEmpty. Operand 14829 states and 38932 transitions. [2021-06-05 13:47:34,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:34,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:34,209 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 13:47:34,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable850,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:34,409 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:34,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:34,409 INFO L82 PathProgramCache]: Analyzing trace with hash -801688664, now seen corresponding path program 245 times [2021-06-05 13:47:34,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:34,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743390836] [2021-06-05 13:47:34,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:34,485 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 13:47:34,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:34,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743390836] [2021-06-05 13:47:34,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743390836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:34,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954907544] [2021-06-05 13:47:34,486 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 13:47:34,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 13:47:34,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:34,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:47:34,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:34,652 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 13:47:34,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954907544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:34,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:34,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2021-06-05 13:47:34,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860548343] [2021-06-05 13:47:34,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:47:34,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:34,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:47:34,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:47:34,652 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 13:47:34,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:34,964 INFO L93 Difference]: Finished difference Result 15741 states and 40619 transitions. [2021-06-05 13:47:34,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:47:34,964 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 13:47:34,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:34,983 INFO L225 Difference]: With dead ends: 15741 [2021-06-05 13:47:34,983 INFO L226 Difference]: Without dead ends: 15735 [2021-06-05 13:47:34,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:47:34,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15735 states. [2021-06-05 13:47:35,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15735 to 14730. [2021-06-05 13:47:35,164 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 13:47:35,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14730 states to 14730 states and 38625 transitions. [2021-06-05 13:47:35,188 INFO L78 Accepts]: Start accepts. Automaton has 14730 states and 38625 transitions. Word has length 59 [2021-06-05 13:47:35,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:35,188 INFO L482 AbstractCegarLoop]: Abstraction has 14730 states and 38625 transitions. [2021-06-05 13:47:35,188 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 13:47:35,188 INFO L276 IsEmpty]: Start isEmpty. Operand 14730 states and 38625 transitions. [2021-06-05 13:47:35,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:35,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:35,198 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 13:47:35,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-06-05 13:47:35,399 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:35,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:35,399 INFO L82 PathProgramCache]: Analyzing trace with hash 925621557, now seen corresponding path program 114 times [2021-06-05 13:47:35,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:35,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101093715] [2021-06-05 13:47:35,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:35,496 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 13:47:35,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:35,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101093715] [2021-06-05 13:47:35,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101093715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:35,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40977691] [2021-06-05 13:47:35,496 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 13:47:35,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 13:47:35,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:35,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:47:35,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:35,615 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 13:47:35,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40977691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:35,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:35,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:47:35,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065764823] [2021-06-05 13:47:35,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:47:35,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:35,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:47:35,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:47:35,616 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 13:47:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:36,125 INFO L93 Difference]: Finished difference Result 16762 states and 42638 transitions. [2021-06-05 13:47:36,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:47:36,125 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 13:47:36,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:36,145 INFO L225 Difference]: With dead ends: 16762 [2021-06-05 13:47:36,145 INFO L226 Difference]: Without dead ends: 16710 [2021-06-05 13:47:36,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:36,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16710 states. [2021-06-05 13:47:36,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16710 to 14900. [2021-06-05 13:47:36,358 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 13:47:36,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14900 states to 14900 states and 39030 transitions. [2021-06-05 13:47:36,381 INFO L78 Accepts]: Start accepts. Automaton has 14900 states and 39030 transitions. Word has length 59 [2021-06-05 13:47:36,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:36,381 INFO L482 AbstractCegarLoop]: Abstraction has 14900 states and 39030 transitions. [2021-06-05 13:47:36,381 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 13:47:36,381 INFO L276 IsEmpty]: Start isEmpty. Operand 14900 states and 39030 transitions. [2021-06-05 13:47:36,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:36,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:36,391 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 13:47:36,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable854 [2021-06-05 13:47:36,592 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:36,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:36,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1869012747, now seen corresponding path program 246 times [2021-06-05 13:47:36,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:36,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655705279] [2021-06-05 13:47:36,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:36,680 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 13:47:36,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:36,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655705279] [2021-06-05 13:47:36,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655705279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:36,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489974312] [2021-06-05 13:47:36,680 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 13:47:36,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 13:47:36,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:36,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:47:36,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:36,845 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 13:47:36,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489974312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:36,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:36,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 13:47:36,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839809792] [2021-06-05 13:47:36,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:47:36,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:36,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:47:36,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:47:36,846 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 13:47:37,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:37,571 INFO L93 Difference]: Finished difference Result 15921 states and 40869 transitions. [2021-06-05 13:47:37,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:47:37,571 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 13:47:37,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:37,590 INFO L225 Difference]: With dead ends: 15921 [2021-06-05 13:47:37,590 INFO L226 Difference]: Without dead ends: 15883 [2021-06-05 13:47:37,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15883 states. [2021-06-05 13:47:37,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15883 to 14906. [2021-06-05 13:47:37,755 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 13:47:37,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14906 states to 14906 states and 39011 transitions. [2021-06-05 13:47:37,777 INFO L78 Accepts]: Start accepts. Automaton has 14906 states and 39011 transitions. Word has length 59 [2021-06-05 13:47:37,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:37,777 INFO L482 AbstractCegarLoop]: Abstraction has 14906 states and 39011 transitions. [2021-06-05 13:47:37,777 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 13:47:37,777 INFO L276 IsEmpty]: Start isEmpty. Operand 14906 states and 39011 transitions. [2021-06-05 13:47:37,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:37,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:37,787 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 13:47:37,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable855 [2021-06-05 13:47:37,987 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:37,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:37,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1812418369, now seen corresponding path program 247 times [2021-06-05 13:47:37,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:37,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134624670] [2021-06-05 13:47:37,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:38,081 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 13:47:38,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:38,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134624670] [2021-06-05 13:47:38,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134624670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:38,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476872222] [2021-06-05 13:47:38,081 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 13:47:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:38,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:47:38,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:38,194 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 13:47:38,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476872222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:38,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:38,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:47:38,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611918888] [2021-06-05 13:47:38,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:47:38,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:38,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:47:38,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:47:38,195 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 13:47:38,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:38,758 INFO L93 Difference]: Finished difference Result 16341 states and 41812 transitions. [2021-06-05 13:47:38,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:47:38,758 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 13:47:38,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:38,777 INFO L225 Difference]: With dead ends: 16341 [2021-06-05 13:47:38,777 INFO L226 Difference]: Without dead ends: 16329 [2021-06-05 13:47:38,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:38,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16329 states. [2021-06-05 13:47:38,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16329 to 14918. [2021-06-05 13:47:38,952 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 13:47:38,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14918 states to 14918 states and 39032 transitions. [2021-06-05 13:47:38,976 INFO L78 Accepts]: Start accepts. Automaton has 14918 states and 39032 transitions. Word has length 59 [2021-06-05 13:47:38,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:38,976 INFO L482 AbstractCegarLoop]: Abstraction has 14918 states and 39032 transitions. [2021-06-05 13:47:38,976 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 13:47:38,976 INFO L276 IsEmpty]: Start isEmpty. Operand 14918 states and 39032 transitions. [2021-06-05 13:47:38,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:38,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:38,987 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 13:47:39,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable856 [2021-06-05 13:47:39,187 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:39,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:39,187 INFO L82 PathProgramCache]: Analyzing trace with hash 164060866, now seen corresponding path program 248 times [2021-06-05 13:47:39,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:39,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928258217] [2021-06-05 13:47:39,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:39,276 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 13:47:39,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:39,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928258217] [2021-06-05 13:47:39,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928258217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:39,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305077547] [2021-06-05 13:47:39,277 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 13:47:39,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:39,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:39,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:47:39,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:39,521 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 13:47:39,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305077547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:39,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:39,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:47:39,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540718410] [2021-06-05 13:47:39,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:47:39,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:39,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:47:39,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:47:39,522 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 13:47:39,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:39,781 INFO L93 Difference]: Finished difference Result 16558 states and 41906 transitions. [2021-06-05 13:47:39,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:47:39,782 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 13:47:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:39,799 INFO L225 Difference]: With dead ends: 16558 [2021-06-05 13:47:39,799 INFO L226 Difference]: Without dead ends: 16534 [2021-06-05 13:47:39,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:39,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16534 states. [2021-06-05 13:47:39,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16534 to 14871. [2021-06-05 13:47:39,966 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 13:47:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14871 states to 14871 states and 38857 transitions. [2021-06-05 13:47:39,991 INFO L78 Accepts]: Start accepts. Automaton has 14871 states and 38857 transitions. Word has length 59 [2021-06-05 13:47:39,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:39,991 INFO L482 AbstractCegarLoop]: Abstraction has 14871 states and 38857 transitions. [2021-06-05 13:47:39,991 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 13:47:39,991 INFO L276 IsEmpty]: Start isEmpty. Operand 14871 states and 38857 transitions. [2021-06-05 13:47:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:40,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:40,002 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 13:47:40,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable857,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:40,202 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:40,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:40,202 INFO L82 PathProgramCache]: Analyzing trace with hash -340631593, now seen corresponding path program 249 times [2021-06-05 13:47:40,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:40,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073761085] [2021-06-05 13:47:40,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:40,297 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 13:47:40,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:40,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073761085] [2021-06-05 13:47:40,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073761085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:40,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443582283] [2021-06-05 13:47:40,297 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 13:47:40,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 13:47:40,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:40,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:47:40,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:40,417 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 13:47:40,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443582283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:40,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:40,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:47:40,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702949577] [2021-06-05 13:47:40,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:47:40,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:40,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:47:40,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:47:40,418 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 13:47:41,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:41,047 INFO L93 Difference]: Finished difference Result 17148 states and 43479 transitions. [2021-06-05 13:47:41,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:47:41,047 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 13:47:41,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:41,067 INFO L225 Difference]: With dead ends: 17148 [2021-06-05 13:47:41,067 INFO L226 Difference]: Without dead ends: 17136 [2021-06-05 13:47:41,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:47:41,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17136 states. [2021-06-05 13:47:41,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17136 to 14915. [2021-06-05 13:47:41,248 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 13:47:41,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14915 states to 14915 states and 38969 transitions. [2021-06-05 13:47:41,272 INFO L78 Accepts]: Start accepts. Automaton has 14915 states and 38969 transitions. Word has length 59 [2021-06-05 13:47:41,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:41,272 INFO L482 AbstractCegarLoop]: Abstraction has 14915 states and 38969 transitions. [2021-06-05 13:47:41,272 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 13:47:41,272 INFO L276 IsEmpty]: Start isEmpty. Operand 14915 states and 38969 transitions. [2021-06-05 13:47:41,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:41,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:41,282 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 13:47:41,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable860 [2021-06-05 13:47:41,483 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:41,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:41,483 INFO L82 PathProgramCache]: Analyzing trace with hash -578693110, now seen corresponding path program 115 times [2021-06-05 13:47:41,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:41,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342656343] [2021-06-05 13:47:41,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:41,567 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 13:47:41,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:41,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342656343] [2021-06-05 13:47:41,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342656343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:41,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382930613] [2021-06-05 13:47:41,567 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 13:47:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:41,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:47:41,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:41,683 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 13:47:41,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382930613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:41,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:41,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 13:47:41,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043326482] [2021-06-05 13:47:41,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:47:41,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:41,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:47:41,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:47:41,684 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 13:47:41,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:41,898 INFO L93 Difference]: Finished difference Result 19459 states and 48107 transitions. [2021-06-05 13:47:41,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:47:41,898 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 13:47:41,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:41,920 INFO L225 Difference]: With dead ends: 19459 [2021-06-05 13:47:41,920 INFO L226 Difference]: Without dead ends: 19451 [2021-06-05 13:47:41,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:47:41,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19451 states. [2021-06-05 13:47:42,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19451 to 15127. [2021-06-05 13:47:42,204 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 13:47:42,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15127 states to 15127 states and 39619 transitions. [2021-06-05 13:47:42,226 INFO L78 Accepts]: Start accepts. Automaton has 15127 states and 39619 transitions. Word has length 59 [2021-06-05 13:47:42,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:42,226 INFO L482 AbstractCegarLoop]: Abstraction has 15127 states and 39619 transitions. [2021-06-05 13:47:42,226 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 13:47:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 15127 states and 39619 transitions. [2021-06-05 13:47:42,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:42,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:42,236 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 13:47:42,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable861 [2021-06-05 13:47:42,436 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:42,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:42,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1200573520, now seen corresponding path program 116 times [2021-06-05 13:47:42,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:42,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836285713] [2021-06-05 13:47:42,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:42,512 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 13:47:42,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:42,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836285713] [2021-06-05 13:47:42,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836285713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:42,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407218306] [2021-06-05 13:47:42,512 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 13:47:42,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:42,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:42,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:47:42,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:42,635 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 13:47:42,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407218306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:42,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:42,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 13:47:42,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570438810] [2021-06-05 13:47:42,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:47:42,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:42,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:47:42,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:47:42,636 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 13:47:42,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:42,868 INFO L93 Difference]: Finished difference Result 21539 states and 52894 transitions. [2021-06-05 13:47:42,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:47:42,869 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 13:47:42,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:42,893 INFO L225 Difference]: With dead ends: 21539 [2021-06-05 13:47:42,893 INFO L226 Difference]: Without dead ends: 21539 [2021-06-05 13:47:42,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:47:42,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21539 states. [2021-06-05 13:47:43,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21539 to 15133. [2021-06-05 13:47:43,097 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 13:47:43,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15133 states to 15133 states and 39631 transitions. [2021-06-05 13:47:43,124 INFO L78 Accepts]: Start accepts. Automaton has 15133 states and 39631 transitions. Word has length 59 [2021-06-05 13:47:43,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:43,125 INFO L482 AbstractCegarLoop]: Abstraction has 15133 states and 39631 transitions. [2021-06-05 13:47:43,125 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 13:47:43,125 INFO L276 IsEmpty]: Start isEmpty. Operand 15133 states and 39631 transitions. [2021-06-05 13:47:43,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:43,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:43,136 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 13:47:43,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable863,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:43,336 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:43,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:43,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1456821320, now seen corresponding path program 117 times [2021-06-05 13:47:43,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:43,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60292661] [2021-06-05 13:47:43,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:43,418 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 13:47:43,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:43,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60292661] [2021-06-05 13:47:43,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60292661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:43,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632659220] [2021-06-05 13:47:43,418 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 13:47:43,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 13:47:43,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:43,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:47:43,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:43,546 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 13:47:43,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632659220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:43,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:43,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:47:43,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683577312] [2021-06-05 13:47:43,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:47:43,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:43,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:47:43,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:47:43,547 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 13:47:43,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:43,803 INFO L93 Difference]: Finished difference Result 19875 states and 49164 transitions. [2021-06-05 13:47:43,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:47:43,804 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 13:47:43,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:43,828 INFO L225 Difference]: With dead ends: 19875 [2021-06-05 13:47:43,828 INFO L226 Difference]: Without dead ends: 19875 [2021-06-05 13:47:43,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:47:43,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19875 states. [2021-06-05 13:47:44,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19875 to 14798. [2021-06-05 13:47:44,041 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 13:47:44,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14798 states to 14798 states and 38607 transitions. [2021-06-05 13:47:44,066 INFO L78 Accepts]: Start accepts. Automaton has 14798 states and 38607 transitions. Word has length 59 [2021-06-05 13:47:44,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:44,066 INFO L482 AbstractCegarLoop]: Abstraction has 14798 states and 38607 transitions. [2021-06-05 13:47:44,066 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 13:47:44,066 INFO L276 IsEmpty]: Start isEmpty. Operand 14798 states and 38607 transitions. [2021-06-05 13:47:44,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:44,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:44,077 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 13:47:44,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable864 [2021-06-05 13:47:44,277 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:44,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:44,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1191927516, now seen corresponding path program 250 times [2021-06-05 13:47:44,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:44,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124465763] [2021-06-05 13:47:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:44,388 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 13:47:44,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:44,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124465763] [2021-06-05 13:47:44,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124465763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:44,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735023996] [2021-06-05 13:47:44,388 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 13:47:44,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:44,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:44,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:47:44,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:44,500 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 13:47:44,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735023996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:44,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:44,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:47:44,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935019553] [2021-06-05 13:47:44,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:47:44,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:44,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:47:44,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:47:44,501 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 13:47:44,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:44,749 INFO L93 Difference]: Finished difference Result 16237 states and 41157 transitions. [2021-06-05 13:47:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:47:44,749 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 13:47:44,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:44,769 INFO L225 Difference]: With dead ends: 16237 [2021-06-05 13:47:44,769 INFO L226 Difference]: Without dead ends: 16219 [2021-06-05 13:47:44,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:47:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16219 states. [2021-06-05 13:47:45,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16219 to 14798. [2021-06-05 13:47:45,022 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 13:47:45,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14798 states to 14798 states and 38595 transitions. [2021-06-05 13:47:45,048 INFO L78 Accepts]: Start accepts. Automaton has 14798 states and 38595 transitions. Word has length 59 [2021-06-05 13:47:45,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:45,048 INFO L482 AbstractCegarLoop]: Abstraction has 14798 states and 38595 transitions. [2021-06-05 13:47:45,049 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 13:47:45,049 INFO L276 IsEmpty]: Start isEmpty. Operand 14798 states and 38595 transitions. [2021-06-05 13:47:45,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:45,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:45,059 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 13:47:45,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable865,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:45,259 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:45,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:45,259 INFO L82 PathProgramCache]: Analyzing trace with hash 2094564251, now seen corresponding path program 118 times [2021-06-05 13:47:45,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:45,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84367139] [2021-06-05 13:47:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:45,365 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 13:47:45,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:45,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84367139] [2021-06-05 13:47:45,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84367139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:45,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94380476] [2021-06-05 13:47:45,366 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 13:47:45,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:45,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:45,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:47:45,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:45,521 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 13:47:45,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94380476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:45,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:45,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:47:45,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560079975] [2021-06-05 13:47:45,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:47:45,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:45,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:47:45,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:47:45,522 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 13:47:46,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:46,096 INFO L93 Difference]: Finished difference Result 16875 states and 42676 transitions. [2021-06-05 13:47:46,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:47:46,096 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 13:47:46,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:46,117 INFO L225 Difference]: With dead ends: 16875 [2021-06-05 13:47:46,117 INFO L226 Difference]: Without dead ends: 16832 [2021-06-05 13:47:46,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:46,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16832 states. [2021-06-05 13:47:46,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16832 to 14910. [2021-06-05 13:47:46,316 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 13:47:46,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14910 states to 14910 states and 38888 transitions. [2021-06-05 13:47:46,340 INFO L78 Accepts]: Start accepts. Automaton has 14910 states and 38888 transitions. Word has length 59 [2021-06-05 13:47:46,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:46,340 INFO L482 AbstractCegarLoop]: Abstraction has 14910 states and 38888 transitions. [2021-06-05 13:47:46,340 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 13:47:46,340 INFO L276 IsEmpty]: Start isEmpty. Operand 14910 states and 38888 transitions. [2021-06-05 13:47:46,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:46,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:46,350 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 13:47:46,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable869 [2021-06-05 13:47:46,550 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:46,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:46,550 INFO L82 PathProgramCache]: Analyzing trace with hash 540867394, now seen corresponding path program 251 times [2021-06-05 13:47:46,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:46,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225894055] [2021-06-05 13:47:46,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:46,611 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 13:47:46,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:46,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225894055] [2021-06-05 13:47:46,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225894055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:46,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423760878] [2021-06-05 13:47:46,612 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 13:47:46,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 13:47:46,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:46,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:47:46,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:46,758 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 13:47:46,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423760878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:46,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:46,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2021-06-05 13:47:46,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153344890] [2021-06-05 13:47:46,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:47:46,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:46,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:47:46,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:47:46,759 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 13:47:47,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:47,069 INFO L93 Difference]: Finished difference Result 17259 states and 43116 transitions. [2021-06-05 13:47:47,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:47:47,069 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 13:47:47,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:47,091 INFO L225 Difference]: With dead ends: 17259 [2021-06-05 13:47:47,091 INFO L226 Difference]: Without dead ends: 17256 [2021-06-05 13:47:47,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:47:47,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17256 states. [2021-06-05 13:47:47,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17256 to 14884. [2021-06-05 13:47:47,280 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 13:47:47,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14884 states to 14884 states and 38793 transitions. [2021-06-05 13:47:47,304 INFO L78 Accepts]: Start accepts. Automaton has 14884 states and 38793 transitions. Word has length 59 [2021-06-05 13:47:47,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:47,304 INFO L482 AbstractCegarLoop]: Abstraction has 14884 states and 38793 transitions. [2021-06-05 13:47:47,304 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 13:47:47,304 INFO L276 IsEmpty]: Start isEmpty. Operand 14884 states and 38793 transitions. [2021-06-05 13:47:47,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:47,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:47,314 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 13:47:47,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable870 [2021-06-05 13:47:47,514 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:47,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:47,515 INFO L82 PathProgramCache]: Analyzing trace with hash 747929960, now seen corresponding path program 252 times [2021-06-05 13:47:47,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:47,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650115919] [2021-06-05 13:47:47,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:47,583 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 13:47:47,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:47,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650115919] [2021-06-05 13:47:47,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650115919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:47,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953932590] [2021-06-05 13:47:47,584 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 13:47:47,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 13:47:47,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:47,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:47:47,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:47,700 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 13:47:47,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953932590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:47,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:47,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:47:47,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230447363] [2021-06-05 13:47:47,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:47:47,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:47,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:47:47,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:47:47,701 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 13:47:47,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:47,934 INFO L93 Difference]: Finished difference Result 17001 states and 42513 transitions. [2021-06-05 13:47:47,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:47:47,935 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 13:47:47,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:47,955 INFO L225 Difference]: With dead ends: 17001 [2021-06-05 13:47:47,955 INFO L226 Difference]: Without dead ends: 16983 [2021-06-05 13:47:47,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:47:47,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16983 states. [2021-06-05 13:47:48,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16983 to 14884. [2021-06-05 13:47:48,150 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 13:47:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14884 states to 14884 states and 38773 transitions. [2021-06-05 13:47:48,174 INFO L78 Accepts]: Start accepts. Automaton has 14884 states and 38773 transitions. Word has length 59 [2021-06-05 13:47:48,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:48,174 INFO L482 AbstractCegarLoop]: Abstraction has 14884 states and 38773 transitions. [2021-06-05 13:47:48,174 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 13:47:48,174 INFO L276 IsEmpty]: Start isEmpty. Operand 14884 states and 38773 transitions. [2021-06-05 13:47:48,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:48,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:48,184 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 13:47:48,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable872 [2021-06-05 13:47:48,385 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:48,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:48,385 INFO L82 PathProgramCache]: Analyzing trace with hash -700070053, now seen corresponding path program 253 times [2021-06-05 13:47:48,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:48,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60597351] [2021-06-05 13:47:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:48,548 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 13:47:48,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:48,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60597351] [2021-06-05 13:47:48,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60597351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:48,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067729657] [2021-06-05 13:47:48,549 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 13:47:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:48,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:47:48,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:48,674 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 13:47:48,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067729657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:48,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:48,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 13:47:48,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185807845] [2021-06-05 13:47:48,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:47:48,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:48,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:47:48,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:47:48,675 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 13:47:49,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:49,404 INFO L93 Difference]: Finished difference Result 16014 states and 40804 transitions. [2021-06-05 13:47:49,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:47:49,404 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 13:47:49,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:49,424 INFO L225 Difference]: With dead ends: 16014 [2021-06-05 13:47:49,424 INFO L226 Difference]: Without dead ends: 15958 [2021-06-05 13:47:49,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:49,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15958 states. [2021-06-05 13:47:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15958 to 14911. [2021-06-05 13:47:49,607 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 13:47:49,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14911 states to 14911 states and 38796 transitions. [2021-06-05 13:47:49,631 INFO L78 Accepts]: Start accepts. Automaton has 14911 states and 38796 transitions. Word has length 59 [2021-06-05 13:47:49,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:49,631 INFO L482 AbstractCegarLoop]: Abstraction has 14911 states and 38796 transitions. [2021-06-05 13:47:49,631 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 13:47:49,631 INFO L276 IsEmpty]: Start isEmpty. Operand 14911 states and 38796 transitions. [2021-06-05 13:47:49,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:49,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:49,641 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 13:47:49,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable875,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:49,841 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:49,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:49,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1313606233, now seen corresponding path program 254 times [2021-06-05 13:47:49,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:49,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902321165] [2021-06-05 13:47:49,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:49,937 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 13:47:49,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:49,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902321165] [2021-06-05 13:47:49,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902321165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:49,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399233329] [2021-06-05 13:47:49,938 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 13:47:49,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:49,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:49,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:47:49,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:50,051 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 13:47:50,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399233329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:50,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:50,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:47:50,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778372852] [2021-06-05 13:47:50,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:47:50,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:50,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:47:50,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:47:50,052 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 13:47:50,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:50,631 INFO L93 Difference]: Finished difference Result 16567 states and 42026 transitions. [2021-06-05 13:47:50,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:47:50,631 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 13:47:50,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:50,650 INFO L225 Difference]: With dead ends: 16567 [2021-06-05 13:47:50,650 INFO L226 Difference]: Without dead ends: 16555 [2021-06-05 13:47:50,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:50,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16555 states. [2021-06-05 13:47:50,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16555 to 14947. [2021-06-05 13:47:50,838 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 13:47:50,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14947 states to 14947 states and 38874 transitions. [2021-06-05 13:47:50,864 INFO L78 Accepts]: Start accepts. Automaton has 14947 states and 38874 transitions. Word has length 59 [2021-06-05 13:47:50,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:50,864 INFO L482 AbstractCegarLoop]: Abstraction has 14947 states and 38874 transitions. [2021-06-05 13:47:50,864 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 13:47:50,864 INFO L276 IsEmpty]: Start isEmpty. Operand 14947 states and 38874 transitions. [2021-06-05 13:47:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:50,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:50,875 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 13:47:51,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable876 [2021-06-05 13:47:51,075 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:51,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:51,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1470905720, now seen corresponding path program 119 times [2021-06-05 13:47:51,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:51,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453577901] [2021-06-05 13:47:51,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:51,145 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 13:47:51,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:51,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453577901] [2021-06-05 13:47:51,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453577901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:51,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451405455] [2021-06-05 13:47:51,146 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 13:47:51,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 13:47:51,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:51,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:47:51,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:51,283 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 13:47:51,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451405455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:51,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:51,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-05 13:47:51,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29545156] [2021-06-05 13:47:51,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:47:51,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:51,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:47:51,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:47:51,283 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 13:47:51,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:51,501 INFO L93 Difference]: Finished difference Result 19543 states and 48102 transitions. [2021-06-05 13:47:51,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:47:51,501 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 13:47:51,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:51,522 INFO L225 Difference]: With dead ends: 19543 [2021-06-05 13:47:51,522 INFO L226 Difference]: Without dead ends: 19523 [2021-06-05 13:47:51,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:47:51,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19523 states. [2021-06-05 13:47:51,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19523 to 15262. [2021-06-05 13:47:51,718 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 13:47:51,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15262 states to 15262 states and 39813 transitions. [2021-06-05 13:47:51,742 INFO L78 Accepts]: Start accepts. Automaton has 15262 states and 39813 transitions. Word has length 59 [2021-06-05 13:47:51,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:51,742 INFO L482 AbstractCegarLoop]: Abstraction has 15262 states and 39813 transitions. [2021-06-05 13:47:51,742 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 13:47:51,742 INFO L276 IsEmpty]: Start isEmpty. Operand 15262 states and 39813 transitions. [2021-06-05 13:47:51,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:51,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:51,752 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 13:47:51,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable877,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:51,953 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:51,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:51,953 INFO L82 PathProgramCache]: Analyzing trace with hash 828311101, now seen corresponding path program 255 times [2021-06-05 13:47:51,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:51,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438667429] [2021-06-05 13:47:51,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:52,132 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 13:47:52,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:52,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438667429] [2021-06-05 13:47:52,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438667429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:52,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445744599] [2021-06-05 13:47:52,133 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 13:47:52,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 13:47:52,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:52,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:47:52,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:52,254 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 13:47:52,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445744599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:52,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:52,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:47:52,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387779111] [2021-06-05 13:47:52,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:47:52,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:52,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:47:52,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:47:52,255 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 13:47:52,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:52,980 INFO L93 Difference]: Finished difference Result 18379 states and 46239 transitions. [2021-06-05 13:47:52,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:47:52,981 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 13:47:52,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:53,002 INFO L225 Difference]: With dead ends: 18379 [2021-06-05 13:47:53,003 INFO L226 Difference]: Without dead ends: 18337 [2021-06-05 13:47:53,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 286.7ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:47:53,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18337 states. [2021-06-05 13:47:53,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18337 to 15333. [2021-06-05 13:47:53,192 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 13:47:53,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15333 states to 15333 states and 40005 transitions. [2021-06-05 13:47:53,216 INFO L78 Accepts]: Start accepts. Automaton has 15333 states and 40005 transitions. Word has length 59 [2021-06-05 13:47:53,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:53,216 INFO L482 AbstractCegarLoop]: Abstraction has 15333 states and 40005 transitions. [2021-06-05 13:47:53,216 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 13:47:53,216 INFO L276 IsEmpty]: Start isEmpty. Operand 15333 states and 40005 transitions. [2021-06-05 13:47:53,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:53,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:53,226 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 13:47:53,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:53,426 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:53,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:53,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1934097086, now seen corresponding path program 256 times [2021-06-05 13:47:53,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:53,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215191222] [2021-06-05 13:47:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:53,504 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 13:47:53,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:53,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215191222] [2021-06-05 13:47:53,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215191222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:53,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861595430] [2021-06-05 13:47:53,504 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 13:47:53,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:53,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:53,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:47:53,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:53,617 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 13:47:53,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861595430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:53,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:53,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:47:53,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991233256] [2021-06-05 13:47:53,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:47:53,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:53,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:47:53,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:47:53,618 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 13:47:53,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:53,928 INFO L93 Difference]: Finished difference Result 17426 states and 43666 transitions. [2021-06-05 13:47:53,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:47:53,929 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 13:47:53,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:53,948 INFO L225 Difference]: With dead ends: 17426 [2021-06-05 13:47:53,948 INFO L226 Difference]: Without dead ends: 17402 [2021-06-05 13:47:53,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:53,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17402 states. [2021-06-05 13:47:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17402 to 14978. [2021-06-05 13:47:54,127 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 13:47:54,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14978 states to 14978 states and 38992 transitions. [2021-06-05 13:47:54,150 INFO L78 Accepts]: Start accepts. Automaton has 14978 states and 38992 transitions. Word has length 59 [2021-06-05 13:47:54,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:54,150 INFO L482 AbstractCegarLoop]: Abstraction has 14978 states and 38992 transitions. [2021-06-05 13:47:54,150 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 13:47:54,150 INFO L276 IsEmpty]: Start isEmpty. Operand 14978 states and 38992 transitions. [2021-06-05 13:47:54,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:54,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:54,160 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 13:47:54,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable881,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:54,360 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:54,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:54,360 INFO L82 PathProgramCache]: Analyzing trace with hash 983147635, now seen corresponding path program 257 times [2021-06-05 13:47:54,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:54,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704181449] [2021-06-05 13:47:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:54,465 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 13:47:54,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:54,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704181449] [2021-06-05 13:47:54,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704181449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:54,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034217237] [2021-06-05 13:47:54,465 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 13:47:54,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 13:47:54,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:54,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:47:54,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:54,585 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 13:47:54,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034217237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:54,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:54,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:47:54,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490257225] [2021-06-05 13:47:54,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:47:54,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:54,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:47:54,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:47:54,586 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 13:47:55,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:55,292 INFO L93 Difference]: Finished difference Result 18584 states and 46418 transitions. [2021-06-05 13:47:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:47:55,292 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 13:47:55,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:55,313 INFO L225 Difference]: With dead ends: 18584 [2021-06-05 13:47:55,313 INFO L226 Difference]: Without dead ends: 18530 [2021-06-05 13:47:55,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:47:55,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18530 states. [2021-06-05 13:47:55,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18530 to 14933. [2021-06-05 13:47:55,572 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 13:47:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14933 states to 14933 states and 38840 transitions. [2021-06-05 13:47:55,593 INFO L78 Accepts]: Start accepts. Automaton has 14933 states and 38840 transitions. Word has length 59 [2021-06-05 13:47:55,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:55,593 INFO L482 AbstractCegarLoop]: Abstraction has 14933 states and 38840 transitions. [2021-06-05 13:47:55,593 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 13:47:55,593 INFO L276 IsEmpty]: Start isEmpty. Operand 14933 states and 38840 transitions. [2021-06-05 13:47:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:55,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:55,603 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 13:47:55,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable885 [2021-06-05 13:47:55,803 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:55,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:55,803 INFO L82 PathProgramCache]: Analyzing trace with hash 123205708, now seen corresponding path program 120 times [2021-06-05 13:47:55,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:55,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848845665] [2021-06-05 13:47:55,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:55,871 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 13:47:55,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:55,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848845665] [2021-06-05 13:47:55,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848845665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:55,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376405887] [2021-06-05 13:47:55,872 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 13:47:55,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 13:47:55,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:55,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:47:55,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:55,997 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 13:47:55,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376405887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:55,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:55,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 13:47:55,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308498475] [2021-06-05 13:47:55,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:47:55,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:55,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:47:55,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:47:55,998 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 13:47:56,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:56,250 INFO L93 Difference]: Finished difference Result 22981 states and 56099 transitions. [2021-06-05 13:47:56,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:47:56,250 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 13:47:56,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:56,277 INFO L225 Difference]: With dead ends: 22981 [2021-06-05 13:47:56,277 INFO L226 Difference]: Without dead ends: 22981 [2021-06-05 13:47:56,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:56,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22981 states. [2021-06-05 13:47:56,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22981 to 15053. [2021-06-05 13:47:56,508 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 13:47:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15053 states to 15053 states and 39202 transitions. [2021-06-05 13:47:56,533 INFO L78 Accepts]: Start accepts. Automaton has 15053 states and 39202 transitions. Word has length 59 [2021-06-05 13:47:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:56,534 INFO L482 AbstractCegarLoop]: Abstraction has 15053 states and 39202 transitions. [2021-06-05 13:47:56,534 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 13:47:56,534 INFO L276 IsEmpty]: Start isEmpty. Operand 15053 states and 39202 transitions. [2021-06-05 13:47:56,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:56,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:56,544 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 13:47:56,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable886,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:56,745 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:56,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:56,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1514366748, now seen corresponding path program 121 times [2021-06-05 13:47:56,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:56,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941798648] [2021-06-05 13:47:56,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:56,822 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 13:47:56,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:56,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941798648] [2021-06-05 13:47:56,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941798648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:56,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578818118] [2021-06-05 13:47:56,823 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 13:47:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:56,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:47:56,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:56,945 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 13:47:56,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578818118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:56,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:56,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:47:56,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836579190] [2021-06-05 13:47:56,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:47:56,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:56,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:47:56,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:47:56,947 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 13:47:57,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:57,243 INFO L93 Difference]: Finished difference Result 22759 states and 55530 transitions. [2021-06-05 13:47:57,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:47:57,243 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 13:47:57,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:57,269 INFO L225 Difference]: With dead ends: 22759 [2021-06-05 13:47:57,269 INFO L226 Difference]: Without dead ends: 22759 [2021-06-05 13:47:57,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:47:57,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22759 states. [2021-06-05 13:47:57,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22759 to 15073. [2021-06-05 13:47:57,506 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 13:47:57,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15073 states to 15073 states and 39259 transitions. [2021-06-05 13:47:57,531 INFO L78 Accepts]: Start accepts. Automaton has 15073 states and 39259 transitions. Word has length 59 [2021-06-05 13:47:57,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:57,531 INFO L482 AbstractCegarLoop]: Abstraction has 15073 states and 39259 transitions. [2021-06-05 13:47:57,531 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 13:47:57,531 INFO L276 IsEmpty]: Start isEmpty. Operand 15073 states and 39259 transitions. [2021-06-05 13:47:57,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:57,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:57,542 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 13:47:57,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable887 [2021-06-05 13:47:57,742 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:57,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:57,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1090605384, now seen corresponding path program 122 times [2021-06-05 13:47:57,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:57,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124056315] [2021-06-05 13:47:57,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:57,834 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 13:47:57,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:57,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124056315] [2021-06-05 13:47:57,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124056315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:57,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897840024] [2021-06-05 13:47:57,834 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 13:47:57,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:57,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:57,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:47:57,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:57,958 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 13:47:57,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897840024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:57,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:57,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 13:47:57,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562350288] [2021-06-05 13:47:57,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:47:57,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:57,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:47:57,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:47:57,958 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 13:47:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:58,286 INFO L93 Difference]: Finished difference Result 19776 states and 48785 transitions. [2021-06-05 13:47:58,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:47:58,287 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 13:47:58,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:58,311 INFO L225 Difference]: With dead ends: 19776 [2021-06-05 13:47:58,311 INFO L226 Difference]: Without dead ends: 19776 [2021-06-05 13:47:58,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:47:58,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19776 states. [2021-06-05 13:47:58,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19776 to 14764. [2021-06-05 13:47:58,521 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 13:47:58,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14764 states to 14764 states and 38355 transitions. [2021-06-05 13:47:58,544 INFO L78 Accepts]: Start accepts. Automaton has 14764 states and 38355 transitions. Word has length 59 [2021-06-05 13:47:58,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:58,544 INFO L482 AbstractCegarLoop]: Abstraction has 14764 states and 38355 transitions. [2021-06-05 13:47:58,545 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 13:47:58,545 INFO L276 IsEmpty]: Start isEmpty. Operand 14764 states and 38355 transitions. [2021-06-05 13:47:58,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:58,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:58,555 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 13:47:58,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-06-05 13:47:58,755 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:58,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:58,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1369750312, now seen corresponding path program 258 times [2021-06-05 13:47:58,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:58,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689832779] [2021-06-05 13:47:58,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:58,844 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 13:47:58,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:58,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689832779] [2021-06-05 13:47:58,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689832779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:58,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690893947] [2021-06-05 13:47:58,844 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 13:47:58,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 13:47:58,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:58,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:47:58,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:59,049 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 13:47:59,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690893947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:59,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:59,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 13:47:59,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185698500] [2021-06-05 13:47:59,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:47:59,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:59,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:47:59,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:47:59,050 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 13:47:59,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:59,347 INFO L93 Difference]: Finished difference Result 16631 states and 41638 transitions. [2021-06-05 13:47:59,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:47:59,347 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 13:47:59,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:59,367 INFO L225 Difference]: With dead ends: 16631 [2021-06-05 13:47:59,367 INFO L226 Difference]: Without dead ends: 16604 [2021-06-05 13:47:59,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:47:59,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16604 states. [2021-06-05 13:47:59,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16604 to 14764. [2021-06-05 13:47:59,550 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 13:47:59,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14764 states to 14764 states and 38346 transitions. [2021-06-05 13:47:59,575 INFO L78 Accepts]: Start accepts. Automaton has 14764 states and 38346 transitions. Word has length 59 [2021-06-05 13:47:59,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:59,575 INFO L482 AbstractCegarLoop]: Abstraction has 14764 states and 38346 transitions. [2021-06-05 13:47:59,575 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 13:47:59,575 INFO L276 IsEmpty]: Start isEmpty. Operand 14764 states and 38346 transitions. [2021-06-05 13:47:59,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:47:59,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:59,585 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 13:47:59,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable889 [2021-06-05 13:47:59,786 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:59,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:59,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1823442059, now seen corresponding path program 123 times [2021-06-05 13:47:59,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:59,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914947320] [2021-06-05 13:47:59,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:59,880 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 13:47:59,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:59,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914947320] [2021-06-05 13:47:59,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914947320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:59,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369687474] [2021-06-05 13:47:59,880 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 13:47:59,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 13:47:59,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:59,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:47:59,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:00,001 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 13:48:00,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369687474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:00,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:00,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:48:00,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680911837] [2021-06-05 13:48:00,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:48:00,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:00,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:48:00,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:48:00,002 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 13:48:00,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:00,566 INFO L93 Difference]: Finished difference Result 16764 states and 42302 transitions. [2021-06-05 13:48:00,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:48:00,566 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 13:48:00,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:00,584 INFO L225 Difference]: With dead ends: 16764 [2021-06-05 13:48:00,585 INFO L226 Difference]: Without dead ends: 16726 [2021-06-05 13:48:00,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 148.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:48:00,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16726 states. [2021-06-05 13:48:00,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16726 to 14878. [2021-06-05 13:48:00,755 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 13:48:00,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14878 states to 14878 states and 38640 transitions. [2021-06-05 13:48:00,777 INFO L78 Accepts]: Start accepts. Automaton has 14878 states and 38640 transitions. Word has length 59 [2021-06-05 13:48:00,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:00,778 INFO L482 AbstractCegarLoop]: Abstraction has 14878 states and 38640 transitions. [2021-06-05 13:48:00,778 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 13:48:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 14878 states and 38640 transitions. [2021-06-05 13:48:00,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:00,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:00,787 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 13:48:00,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable894 [2021-06-05 13:48:00,988 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:00,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:00,988 INFO L82 PathProgramCache]: Analyzing trace with hash 917828380, now seen corresponding path program 259 times [2021-06-05 13:48:00,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:00,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765200073] [2021-06-05 13:48:00,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:01,049 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 13:48:01,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:01,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765200073] [2021-06-05 13:48:01,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765200073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:01,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261337554] [2021-06-05 13:48:01,049 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 13:48:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:01,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:01,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:01,160 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 13:48:01,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261337554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:01,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:01,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 13:48:01,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685811193] [2021-06-05 13:48:01,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:48:01,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:01,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:48:01,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:48:01,161 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 13:48:01,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:01,345 INFO L93 Difference]: Finished difference Result 17271 states and 42891 transitions. [2021-06-05 13:48:01,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:48:01,345 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 13:48:01,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:01,364 INFO L225 Difference]: With dead ends: 17271 [2021-06-05 13:48:01,364 INFO L226 Difference]: Without dead ends: 17268 [2021-06-05 13:48:01,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:48:01,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17268 states. [2021-06-05 13:48:01,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17268 to 14858. [2021-06-05 13:48:01,551 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 13:48:01,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14858 states to 14858 states and 38563 transitions. [2021-06-05 13:48:01,574 INFO L78 Accepts]: Start accepts. Automaton has 14858 states and 38563 transitions. Word has length 59 [2021-06-05 13:48:01,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:01,574 INFO L482 AbstractCegarLoop]: Abstraction has 14858 states and 38563 transitions. [2021-06-05 13:48:01,574 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 13:48:01,574 INFO L276 IsEmpty]: Start isEmpty. Operand 14858 states and 38563 transitions. [2021-06-05 13:48:01,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:01,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:01,584 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 13:48:01,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-06-05 13:48:01,784 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:01,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:01,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1124890946, now seen corresponding path program 260 times [2021-06-05 13:48:01,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:01,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527327086] [2021-06-05 13:48:01,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:01,852 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 13:48:01,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:01,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527327086] [2021-06-05 13:48:01,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527327086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:01,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581950388] [2021-06-05 13:48:01,853 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 13:48:01,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:48:01,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:01,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:01,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:01,966 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 13:48:01,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581950388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:01,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:01,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:48:01,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749875892] [2021-06-05 13:48:01,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:48:01,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:01,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:48:01,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:48:01,966 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 13:48:02,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:02,192 INFO L93 Difference]: Finished difference Result 17287 states and 42863 transitions. [2021-06-05 13:48:02,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:48:02,193 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 13:48:02,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:02,210 INFO L225 Difference]: With dead ends: 17287 [2021-06-05 13:48:02,211 INFO L226 Difference]: Without dead ends: 17269 [2021-06-05 13:48:02,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:48:02,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17269 states. [2021-06-05 13:48:02,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17269 to 14858. [2021-06-05 13:48:02,465 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 13:48:02,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14858 states to 14858 states and 38539 transitions. [2021-06-05 13:48:02,490 INFO L78 Accepts]: Start accepts. Automaton has 14858 states and 38539 transitions. Word has length 59 [2021-06-05 13:48:02,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:02,490 INFO L482 AbstractCegarLoop]: Abstraction has 14858 states and 38539 transitions. [2021-06-05 13:48:02,490 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 13:48:02,490 INFO L276 IsEmpty]: Start isEmpty. Operand 14858 states and 38539 transitions. [2021-06-05 13:48:02,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:02,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:02,500 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 13:48:02,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable897,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:02,700 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:02,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:02,701 INFO L82 PathProgramCache]: Analyzing trace with hash -323109067, now seen corresponding path program 261 times [2021-06-05 13:48:02,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:02,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662292797] [2021-06-05 13:48:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:02,795 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 13:48:02,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:02,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662292797] [2021-06-05 13:48:02,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662292797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:02,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532610381] [2021-06-05 13:48:02,795 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 13:48:02,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 13:48:02,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:02,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:48:02,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:02,940 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 13:48:02,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532610381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:02,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:02,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 13:48:02,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55899139] [2021-06-05 13:48:02,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:48:02,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:02,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:48:02,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:48:02,941 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 13:48:03,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:03,771 INFO L93 Difference]: Finished difference Result 15989 states and 40590 transitions. [2021-06-05 13:48:03,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:48:03,771 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 13:48:03,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:03,788 INFO L225 Difference]: With dead ends: 15989 [2021-06-05 13:48:03,788 INFO L226 Difference]: Without dead ends: 15915 [2021-06-05 13:48:03,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:48:03,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15915 states. [2021-06-05 13:48:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15915 to 14924. [2021-06-05 13:48:03,966 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 13:48:03,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14924 states to 14924 states and 38635 transitions. [2021-06-05 13:48:03,989 INFO L78 Accepts]: Start accepts. Automaton has 14924 states and 38635 transitions. Word has length 59 [2021-06-05 13:48:03,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:03,989 INFO L482 AbstractCegarLoop]: Abstraction has 14924 states and 38635 transitions. [2021-06-05 13:48:03,989 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 13:48:03,989 INFO L276 IsEmpty]: Start isEmpty. Operand 14924 states and 38635 transitions. [2021-06-05 13:48:03,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:03,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:03,999 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 13:48:04,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:04,200 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:04,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:04,200 INFO L82 PathProgramCache]: Analyzing trace with hash -936645247, now seen corresponding path program 262 times [2021-06-05 13:48:04,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:04,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033920793] [2021-06-05 13:48:04,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:04,328 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 13:48:04,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:04,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033920793] [2021-06-05 13:48:04,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033920793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:04,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215557265] [2021-06-05 13:48:04,329 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 13:48:04,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:48:04,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:04,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:48:04,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:04,465 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 13:48:04,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215557265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:04,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:04,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:48:04,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124717953] [2021-06-05 13:48:04,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:48:04,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:04,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:48:04,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:48:04,466 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 13:48:05,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:05,087 INFO L93 Difference]: Finished difference Result 16650 states and 42030 transitions. [2021-06-05 13:48:05,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:48:05,087 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 13:48:05,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:05,106 INFO L225 Difference]: With dead ends: 16650 [2021-06-05 13:48:05,107 INFO L226 Difference]: Without dead ends: 16638 [2021-06-05 13:48:05,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:48:05,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16638 states. [2021-06-05 13:48:05,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16638 to 14998. [2021-06-05 13:48:05,300 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 13:48:05,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14998 states to 14998 states and 38809 transitions. [2021-06-05 13:48:05,324 INFO L78 Accepts]: Start accepts. Automaton has 14998 states and 38809 transitions. Word has length 59 [2021-06-05 13:48:05,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:05,324 INFO L482 AbstractCegarLoop]: Abstraction has 14998 states and 38809 transitions. [2021-06-05 13:48:05,324 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 13:48:05,324 INFO L276 IsEmpty]: Start isEmpty. Operand 14998 states and 38809 transitions. [2021-06-05 13:48:05,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:05,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:05,335 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 13:48:05,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable901,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:05,535 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:05,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:05,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1205272087, now seen corresponding path program 263 times [2021-06-05 13:48:05,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:05,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872825376] [2021-06-05 13:48:05,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:05,630 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 13:48:05,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:05,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872825376] [2021-06-05 13:48:05,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872825376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:05,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827734299] [2021-06-05 13:48:05,631 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 13:48:05,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 13:48:05,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:05,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:48:05,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:05,751 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 13:48:05,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827734299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:05,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:05,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:48:05,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30085007] [2021-06-05 13:48:05,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:48:05,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:05,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:48:05,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:48:05,752 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 13:48:06,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:06,473 INFO L93 Difference]: Finished difference Result 18719 states and 46626 transitions. [2021-06-05 13:48:06,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:48:06,474 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 13:48:06,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:06,495 INFO L225 Difference]: With dead ends: 18719 [2021-06-05 13:48:06,496 INFO L226 Difference]: Without dead ends: 18665 [2021-06-05 13:48:06,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 220.2ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:48:06,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18665 states. [2021-06-05 13:48:06,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18665 to 15200. [2021-06-05 13:48:06,697 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 13:48:06,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15200 states to 15200 states and 39347 transitions. [2021-06-05 13:48:06,821 INFO L78 Accepts]: Start accepts. Automaton has 15200 states and 39347 transitions. Word has length 59 [2021-06-05 13:48:06,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:06,821 INFO L482 AbstractCegarLoop]: Abstraction has 15200 states and 39347 transitions. [2021-06-05 13:48:06,821 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 13:48:06,821 INFO L276 IsEmpty]: Start isEmpty. Operand 15200 states and 39347 transitions. [2021-06-05 13:48:06,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:06,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:06,831 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 13:48:07,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable902,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:07,031 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:07,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:07,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1557136100, now seen corresponding path program 264 times [2021-06-05 13:48:07,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:07,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426372683] [2021-06-05 13:48:07,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:07,109 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 13:48:07,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:07,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426372683] [2021-06-05 13:48:07,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426372683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:07,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950879339] [2021-06-05 13:48:07,110 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 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 13:48:07,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 13:48:07,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:07,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:07,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:07,229 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 13:48:07,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950879339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:07,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:07,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:48:07,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904176312] [2021-06-05 13:48:07,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:48:07,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:07,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:48:07,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:48:07,230 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 13:48:07,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:07,434 INFO L93 Difference]: Finished difference Result 17641 states and 43655 transitions. [2021-06-05 13:48:07,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:48:07,435 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 13:48:07,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:07,456 INFO L225 Difference]: With dead ends: 17641 [2021-06-05 13:48:07,456 INFO L226 Difference]: Without dead ends: 17617 [2021-06-05 13:48:07,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:48:07,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17617 states. [2021-06-05 13:48:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17617 to 15200. [2021-06-05 13:48:07,650 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 13:48:07,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15200 states to 15200 states and 39330 transitions. [2021-06-05 13:48:07,677 INFO L78 Accepts]: Start accepts. Automaton has 15200 states and 39330 transitions. Word has length 59 [2021-06-05 13:48:07,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:07,678 INFO L482 AbstractCegarLoop]: Abstraction has 15200 states and 39330 transitions. [2021-06-05 13:48:07,678 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 13:48:07,678 INFO L276 IsEmpty]: Start isEmpty. Operand 15200 states and 39330 transitions. [2021-06-05 13:48:07,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:07,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:07,689 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 13:48:07,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable903 [2021-06-05 13:48:07,889 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:07,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:07,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1360108621, now seen corresponding path program 265 times [2021-06-05 13:48:07,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:07,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509325867] [2021-06-05 13:48:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:07,996 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 13:48:07,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:07,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509325867] [2021-06-05 13:48:07,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509325867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:07,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604851740] [2021-06-05 13:48:07,996 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 13:48:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:08,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:48:08,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:08,112 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 13:48:08,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604851740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:08,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:08,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:48:08,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025115814] [2021-06-05 13:48:08,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:48:08,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:08,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:48:08,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:48:08,113 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 13:48:09,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:09,032 INFO L93 Difference]: Finished difference Result 21862 states and 53696 transitions. [2021-06-05 13:48:09,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 13:48:09,032 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 13:48:09,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:09,058 INFO L225 Difference]: With dead ends: 21862 [2021-06-05 13:48:09,058 INFO L226 Difference]: Without dead ends: 21748 [2021-06-05 13:48:09,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 353.8ms TimeCoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:48:09,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21748 states. [2021-06-05 13:48:09,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21748 to 15415. [2021-06-05 13:48:09,291 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 13:48:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15415 states to 15415 states and 39909 transitions. [2021-06-05 13:48:09,316 INFO L78 Accepts]: Start accepts. Automaton has 15415 states and 39909 transitions. Word has length 59 [2021-06-05 13:48:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:09,316 INFO L482 AbstractCegarLoop]: Abstraction has 15415 states and 39909 transitions. [2021-06-05 13:48:09,316 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 13:48:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 15415 states and 39909 transitions. [2021-06-05 13:48:09,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:09,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:09,327 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 13:48:09,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable907,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:09,527 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:09,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:09,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1746711298, now seen corresponding path program 266 times [2021-06-05 13:48:09,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:09,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263113238] [2021-06-05 13:48:09,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:09,617 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 13:48:09,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:09,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263113238] [2021-06-05 13:48:09,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263113238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:09,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722060147] [2021-06-05 13:48:09,617 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 13:48:09,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:48:09,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:09,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:09,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:09,735 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 13:48:09,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722060147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:09,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:09,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 13:48:09,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052408908] [2021-06-05 13:48:09,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:48:09,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:09,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:48:09,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:48:09,736 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 13:48:10,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:10,031 INFO L93 Difference]: Finished difference Result 17893 states and 44283 transitions. [2021-06-05 13:48:10,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:48:10,032 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 13:48:10,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:10,051 INFO L225 Difference]: With dead ends: 17893 [2021-06-05 13:48:10,051 INFO L226 Difference]: Without dead ends: 17860 [2021-06-05 13:48:10,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:48:10,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17860 states. [2021-06-05 13:48:10,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17860 to 15072. [2021-06-05 13:48:10,246 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 13:48:10,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15072 states to 15072 states and 38939 transitions. [2021-06-05 13:48:10,270 INFO L78 Accepts]: Start accepts. Automaton has 15072 states and 38939 transitions. Word has length 59 [2021-06-05 13:48:10,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:10,270 INFO L482 AbstractCegarLoop]: Abstraction has 15072 states and 38939 transitions. [2021-06-05 13:48:10,270 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 13:48:10,270 INFO L276 IsEmpty]: Start isEmpty. Operand 15072 states and 38939 transitions. [2021-06-05 13:48:10,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:10,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:10,280 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 13:48:10,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable908,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:10,481 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:10,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:10,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1300417111, now seen corresponding path program 267 times [2021-06-05 13:48:10,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:10,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966486078] [2021-06-05 13:48:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:10,598 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 13:48:10,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:10,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966486078] [2021-06-05 13:48:10,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966486078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:10,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414134357] [2021-06-05 13:48:10,598 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 13:48:10,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 13:48:10,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:10,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:48:10,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:10,719 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 13:48:10,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414134357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:10,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:10,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:48:10,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530084875] [2021-06-05 13:48:10,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:48:10,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:10,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:48:10,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:48:10,720 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 13:48:11,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:11,533 INFO L93 Difference]: Finished difference Result 20407 states and 50176 transitions. [2021-06-05 13:48:11,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:48:11,533 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 13:48:11,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:11,551 INFO L225 Difference]: With dead ends: 20407 [2021-06-05 13:48:11,551 INFO L226 Difference]: Without dead ends: 20251 [2021-06-05 13:48:11,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 264.8ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:48:11,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20251 states. [2021-06-05 13:48:11,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20251 to 14617. [2021-06-05 13:48:11,725 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 13:48:11,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14617 states to 14617 states and 37658 transitions. [2021-06-05 13:48:11,747 INFO L78 Accepts]: Start accepts. Automaton has 14617 states and 37658 transitions. Word has length 59 [2021-06-05 13:48:11,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:11,747 INFO L482 AbstractCegarLoop]: Abstraction has 14617 states and 37658 transitions. [2021-06-05 13:48:11,747 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 13:48:11,747 INFO L276 IsEmpty]: Start isEmpty. Operand 14617 states and 37658 transitions. [2021-06-05 13:48:11,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:11,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:11,757 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 13:48:11,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable913 [2021-06-05 13:48:11,957 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:11,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:11,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1062355594, now seen corresponding path program 124 times [2021-06-05 13:48:11,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:11,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730886890] [2021-06-05 13:48:11,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:12,022 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 13:48:12,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:12,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730886890] [2021-06-05 13:48:12,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730886890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:12,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413990080] [2021-06-05 13:48:12,023 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 13:48:12,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:48:12,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:12,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:12,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:12,137 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 13:48:12,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413990080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:12,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:12,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 13:48:12,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196904051] [2021-06-05 13:48:12,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:48:12,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:12,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:48:12,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:48:12,138 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 13:48:12,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:12,360 INFO L93 Difference]: Finished difference Result 18811 states and 46226 transitions. [2021-06-05 13:48:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:48:12,361 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 13:48:12,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:12,382 INFO L225 Difference]: With dead ends: 18811 [2021-06-05 13:48:12,382 INFO L226 Difference]: Without dead ends: 18797 [2021-06-05 13:48:12,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:48:12,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18797 states. [2021-06-05 13:48:12,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18797 to 14958. [2021-06-05 13:48:12,589 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 13:48:12,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14958 states to 14958 states and 38612 transitions. [2021-06-05 13:48:12,612 INFO L78 Accepts]: Start accepts. Automaton has 14958 states and 38612 transitions. Word has length 59 [2021-06-05 13:48:12,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:12,612 INFO L482 AbstractCegarLoop]: Abstraction has 14958 states and 38612 transitions. [2021-06-05 13:48:12,612 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 13:48:12,612 INFO L276 IsEmpty]: Start isEmpty. Operand 14958 states and 38612 transitions. [2021-06-05 13:48:12,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:12,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:12,622 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 13:48:12,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable914,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:12,823 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:12,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:12,823 INFO L82 PathProgramCache]: Analyzing trace with hash 440475184, now seen corresponding path program 125 times [2021-06-05 13:48:12,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:12,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584364308] [2021-06-05 13:48:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:12,894 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 13:48:12,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:12,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584364308] [2021-06-05 13:48:12,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584364308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:12,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18991111] [2021-06-05 13:48:12,894 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 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 13:48:12,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 13:48:12,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:12,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:12,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:13,035 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 13:48:13,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18991111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:13,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:13,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-05 13:48:13,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784295732] [2021-06-05 13:48:13,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:48:13,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:13,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:48:13,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:48:13,035 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 13:48:13,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:13,324 INFO L93 Difference]: Finished difference Result 23655 states and 57376 transitions. [2021-06-05 13:48:13,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:48:13,325 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 13:48:13,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:13,350 INFO L225 Difference]: With dead ends: 23655 [2021-06-05 13:48:13,350 INFO L226 Difference]: Without dead ends: 23655 [2021-06-05 13:48:13,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:48:13,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23655 states. [2021-06-05 13:48:13,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23655 to 14973. [2021-06-05 13:48:13,569 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 13:48:13,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14973 states to 14973 states and 38657 transitions. [2021-06-05 13:48:13,593 INFO L78 Accepts]: Start accepts. Automaton has 14973 states and 38657 transitions. Word has length 59 [2021-06-05 13:48:13,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:13,593 INFO L482 AbstractCegarLoop]: Abstraction has 14973 states and 38657 transitions. [2021-06-05 13:48:13,593 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 13:48:13,593 INFO L276 IsEmpty]: Start isEmpty. Operand 14973 states and 38657 transitions. [2021-06-05 13:48:13,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:13,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:13,603 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 13:48:13,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:13,803 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:13,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:13,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1197097272, now seen corresponding path program 126 times [2021-06-05 13:48:13,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:13,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099088947] [2021-06-05 13:48:13,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:13,882 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 13:48:13,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:13,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099088947] [2021-06-05 13:48:13,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099088947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:13,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324893361] [2021-06-05 13:48:13,883 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 13:48:13,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 13:48:13,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:13,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:13,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:14,014 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 13:48:14,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324893361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:14,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:14,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:48:14,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862454854] [2021-06-05 13:48:14,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:48:14,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:14,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:48:14,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:48:14,015 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 13:48:14,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:14,375 INFO L93 Difference]: Finished difference Result 24867 states and 60280 transitions. [2021-06-05 13:48:14,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:48:14,376 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 13:48:14,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:14,408 INFO L225 Difference]: With dead ends: 24867 [2021-06-05 13:48:14,408 INFO L226 Difference]: Without dead ends: 24867 [2021-06-05 13:48:14,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=170, Invalid=250, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:48:14,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24867 states. [2021-06-05 13:48:14,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24867 to 15014. [2021-06-05 13:48:14,654 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 13:48:14,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15014 states to 15014 states and 38785 transitions. [2021-06-05 13:48:14,678 INFO L78 Accepts]: Start accepts. Automaton has 15014 states and 38785 transitions. Word has length 59 [2021-06-05 13:48:14,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:14,678 INFO L482 AbstractCegarLoop]: Abstraction has 15014 states and 38785 transitions. [2021-06-05 13:48:14,678 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 13:48:14,678 INFO L276 IsEmpty]: Start isEmpty. Operand 15014 states and 38785 transitions. [2021-06-05 13:48:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:14,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:14,688 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 13:48:14,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable917,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:14,889 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:14,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1407874860, now seen corresponding path program 127 times [2021-06-05 13:48:14,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:14,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551146938] [2021-06-05 13:48:14,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:14,980 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 13:48:14,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:14,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551146938] [2021-06-05 13:48:14,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551146938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:14,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955280140] [2021-06-05 13:48:14,981 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 13:48:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:15,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:15,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:15,107 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 13:48:15,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955280140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:15,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:15,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 13:48:15,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725998439] [2021-06-05 13:48:15,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:48:15,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:15,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:48:15,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:48:15,108 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 13:48:15,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:15,488 INFO L93 Difference]: Finished difference Result 23075 states and 56081 transitions. [2021-06-05 13:48:15,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:48:15,488 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 13:48:15,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:15,514 INFO L225 Difference]: With dead ends: 23075 [2021-06-05 13:48:15,514 INFO L226 Difference]: Without dead ends: 23075 [2021-06-05 13:48:15,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:48:15,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23075 states. [2021-06-05 13:48:15,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23075 to 15042. [2021-06-05 13:48:15,742 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 13:48:15,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15042 states to 15042 states and 38865 transitions. [2021-06-05 13:48:15,766 INFO L78 Accepts]: Start accepts. Automaton has 15042 states and 38865 transitions. Word has length 59 [2021-06-05 13:48:15,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:15,767 INFO L482 AbstractCegarLoop]: Abstraction has 15042 states and 38865 transitions. [2021-06-05 13:48:15,767 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 13:48:15,767 INFO L276 IsEmpty]: Start isEmpty. Operand 15042 states and 38865 transitions. [2021-06-05 13:48:15,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:15,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:15,777 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 13:48:15,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable918 [2021-06-05 13:48:15,978 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:15,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:15,978 INFO L82 PathProgramCache]: Analyzing trace with hash 368587848, now seen corresponding path program 128 times [2021-06-05 13:48:15,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:15,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629944222] [2021-06-05 13:48:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:16,084 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 13:48:16,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:16,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629944222] [2021-06-05 13:48:16,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629944222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:16,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912675877] [2021-06-05 13:48:16,084 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 13:48:16,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:48:16,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:16,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:16,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:16,214 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 13:48:16,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912675877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:16,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:16,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 13:48:16,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969287793] [2021-06-05 13:48:16,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:48:16,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:16,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:48:16,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:48:16,215 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 13:48:16,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:16,564 INFO L93 Difference]: Finished difference Result 19432 states and 47841 transitions. [2021-06-05 13:48:16,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:48:16,565 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 13:48:16,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:16,588 INFO L225 Difference]: With dead ends: 19432 [2021-06-05 13:48:16,588 INFO L226 Difference]: Without dead ends: 19432 [2021-06-05 13:48:16,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:48:16,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19432 states. [2021-06-05 13:48:16,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19432 to 14656. [2021-06-05 13:48:16,789 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 13:48:16,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14656 states to 14656 states and 37760 transitions. [2021-06-05 13:48:16,812 INFO L78 Accepts]: Start accepts. Automaton has 14656 states and 37760 transitions. Word has length 59 [2021-06-05 13:48:16,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:16,813 INFO L482 AbstractCegarLoop]: Abstraction has 14656 states and 37760 transitions. [2021-06-05 13:48:16,813 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 13:48:16,813 INFO L276 IsEmpty]: Start isEmpty. Operand 14656 states and 37760 transitions. [2021-06-05 13:48:16,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:16,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:16,823 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 13:48:17,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable919 [2021-06-05 13:48:17,024 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:17,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:17,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1100977316, now seen corresponding path program 268 times [2021-06-05 13:48:17,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:17,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766170793] [2021-06-05 13:48:17,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:17,120 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 13:48:17,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:17,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766170793] [2021-06-05 13:48:17,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766170793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:17,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093475589] [2021-06-05 13:48:17,120 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 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 13:48:17,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:48:17,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:17,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:17,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:17,235 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 13:48:17,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093475589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:17,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:17,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 13:48:17,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379569816] [2021-06-05 13:48:17,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:48:17,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:17,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:48:17,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:48:17,236 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 13:48:17,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:17,576 INFO L93 Difference]: Finished difference Result 16822 states and 41592 transitions. [2021-06-05 13:48:17,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:48:17,576 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 13:48:17,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:17,597 INFO L225 Difference]: With dead ends: 16822 [2021-06-05 13:48:17,597 INFO L226 Difference]: Without dead ends: 16786 [2021-06-05 13:48:17,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:48:17,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16786 states. [2021-06-05 13:48:17,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16786 to 14656. [2021-06-05 13:48:17,794 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 13:48:17,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14656 states to 14656 states and 37748 transitions. [2021-06-05 13:48:17,818 INFO L78 Accepts]: Start accepts. Automaton has 14656 states and 37748 transitions. Word has length 59 [2021-06-05 13:48:17,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:17,818 INFO L482 AbstractCegarLoop]: Abstraction has 14656 states and 37748 transitions. [2021-06-05 13:48:17,818 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 13:48:17,819 INFO L276 IsEmpty]: Start isEmpty. Operand 14656 states and 37748 transitions. [2021-06-05 13:48:17,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:17,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:17,829 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 13:48:18,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable920 [2021-06-05 13:48:18,029 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:18,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:18,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1176780123, now seen corresponding path program 129 times [2021-06-05 13:48:18,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:18,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534303679] [2021-06-05 13:48:18,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:18,127 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 13:48:18,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:18,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534303679] [2021-06-05 13:48:18,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534303679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:18,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704497051] [2021-06-05 13:48:18,128 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 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 13:48:18,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 13:48:18,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:18,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:48:18,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:18,252 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 13:48:18,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704497051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:18,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:18,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:48:18,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247567646] [2021-06-05 13:48:18,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:48:18,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:18,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:48:18,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:48:18,253 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 13:48:18,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:18,812 INFO L93 Difference]: Finished difference Result 16512 states and 41427 transitions. [2021-06-05 13:48:18,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:48:18,812 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 13:48:18,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:18,833 INFO L225 Difference]: With dead ends: 16512 [2021-06-05 13:48:18,833 INFO L226 Difference]: Without dead ends: 16481 [2021-06-05 13:48:18,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 154.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:48:18,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16481 states. [2021-06-05 13:48:19,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16481 to 14732. [2021-06-05 13:48:19,012 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 13:48:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14732 states to 14732 states and 37942 transitions. [2021-06-05 13:48:19,035 INFO L78 Accepts]: Start accepts. Automaton has 14732 states and 37942 transitions. Word has length 59 [2021-06-05 13:48:19,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:19,035 INFO L482 AbstractCegarLoop]: Abstraction has 14732 states and 37942 transitions. [2021-06-05 13:48:19,035 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 13:48:19,035 INFO L276 IsEmpty]: Start isEmpty. Operand 14732 states and 37942 transitions. [2021-06-05 13:48:19,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:19,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:19,044 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 13:48:19,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable926,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:19,245 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:19,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:19,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1617854181, now seen corresponding path program 269 times [2021-06-05 13:48:19,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:19,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571593968] [2021-06-05 13:48:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:19,336 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 13:48:19,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:19,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571593968] [2021-06-05 13:48:19,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571593968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:19,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505152441] [2021-06-05 13:48:19,336 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 13:48:19,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 13:48:19,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:19,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:48:19,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:19,469 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 13:48:19,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505152441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:19,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:19,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 13:48:19,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956870823] [2021-06-05 13:48:19,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:48:19,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:19,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:48:19,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:48:19,469 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 13:48:20,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:20,212 INFO L93 Difference]: Finished difference Result 15859 states and 40013 transitions. [2021-06-05 13:48:20,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:48:20,212 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 13:48:20,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:20,229 INFO L225 Difference]: With dead ends: 15859 [2021-06-05 13:48:20,229 INFO L226 Difference]: Without dead ends: 15767 [2021-06-05 13:48:20,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 152.2ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:48:20,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15767 states. [2021-06-05 13:48:20,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15767 to 14855. [2021-06-05 13:48:20,397 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 13:48:20,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14855 states to 14855 states and 38165 transitions. [2021-06-05 13:48:20,419 INFO L78 Accepts]: Start accepts. Automaton has 14855 states and 38165 transitions. Word has length 59 [2021-06-05 13:48:20,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:20,419 INFO L482 AbstractCegarLoop]: Abstraction has 14855 states and 38165 transitions. [2021-06-05 13:48:20,419 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 13:48:20,420 INFO L276 IsEmpty]: Start isEmpty. Operand 14855 states and 38165 transitions. [2021-06-05 13:48:20,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:20,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:20,429 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 13:48:20,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable927,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:20,630 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:20,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:20,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2063576935, now seen corresponding path program 270 times [2021-06-05 13:48:20,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:20,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611425026] [2021-06-05 13:48:20,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:20,725 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 13:48:20,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:20,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611425026] [2021-06-05 13:48:20,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611425026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:20,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894259454] [2021-06-05 13:48:20,725 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 13:48:20,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 13:48:20,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:20,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:48:20,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:20,846 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 13:48:20,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894259454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:20,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:20,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:48:20,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346151083] [2021-06-05 13:48:20,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:48:20,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:20,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:48:20,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:48:20,847 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 13:48:21,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:21,418 INFO L93 Difference]: Finished difference Result 16568 states and 41541 transitions. [2021-06-05 13:48:21,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:48:21,419 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 13:48:21,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:21,437 INFO L225 Difference]: With dead ends: 16568 [2021-06-05 13:48:21,437 INFO L226 Difference]: Without dead ends: 16556 [2021-06-05 13:48:21,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:48:21,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16556 states. [2021-06-05 13:48:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16556 to 14951. [2021-06-05 13:48:21,629 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 13:48:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14951 states to 14951 states and 38400 transitions. [2021-06-05 13:48:21,655 INFO L78 Accepts]: Start accepts. Automaton has 14951 states and 38400 transitions. Word has length 59 [2021-06-05 13:48:21,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:21,655 INFO L482 AbstractCegarLoop]: Abstraction has 14951 states and 38400 transitions. [2021-06-05 13:48:21,655 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 13:48:21,655 INFO L276 IsEmpty]: Start isEmpty. Operand 14951 states and 38400 transitions. [2021-06-05 13:48:21,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:21,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:21,666 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 13:48:21,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable928,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:21,867 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:21,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:21,867 INFO L82 PathProgramCache]: Analyzing trace with hash 415219432, now seen corresponding path program 271 times [2021-06-05 13:48:21,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:21,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352305798] [2021-06-05 13:48:21,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:21,934 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 13:48:21,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:21,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352305798] [2021-06-05 13:48:21,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352305798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:21,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594048076] [2021-06-05 13:48:21,934 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 13:48:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:21,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:21,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:22,047 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 13:48:22,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594048076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:22,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:22,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:48:22,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445794664] [2021-06-05 13:48:22,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:48:22,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:22,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:48:22,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:48:22,047 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 13:48:22,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:22,243 INFO L93 Difference]: Finished difference Result 17530 states and 42981 transitions. [2021-06-05 13:48:22,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:48:22,243 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 13:48:22,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:22,264 INFO L225 Difference]: With dead ends: 17530 [2021-06-05 13:48:22,264 INFO L226 Difference]: Without dead ends: 17512 [2021-06-05 13:48:22,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:48:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17512 states. [2021-06-05 13:48:22,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17512 to 14926. [2021-06-05 13:48:22,468 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 13:48:22,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14926 states to 14926 states and 38301 transitions. [2021-06-05 13:48:22,492 INFO L78 Accepts]: Start accepts. Automaton has 14926 states and 38301 transitions. Word has length 59 [2021-06-05 13:48:22,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:22,492 INFO L482 AbstractCegarLoop]: Abstraction has 14926 states and 38301 transitions. [2021-06-05 13:48:22,492 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 13:48:22,492 INFO L276 IsEmpty]: Start isEmpty. Operand 14926 states and 38301 transitions. [2021-06-05 13:48:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:22,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:22,502 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 13:48:22,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable929,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:22,703 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:22,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:22,703 INFO L82 PathProgramCache]: Analyzing trace with hash -89473027, now seen corresponding path program 272 times [2021-06-05 13:48:22,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:22,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55095571] [2021-06-05 13:48:22,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:22,797 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 13:48:22,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:22,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55095571] [2021-06-05 13:48:22,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55095571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:22,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241387815] [2021-06-05 13:48:22,797 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 13:48:22,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:48:22,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:22,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:48:22,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:22,913 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 13:48:22,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241387815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:22,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:22,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:48:22,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315566878] [2021-06-05 13:48:22,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:48:22,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:22,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:48:22,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:48:22,914 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 13:48:23,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:23,647 INFO L93 Difference]: Finished difference Result 18642 states and 46055 transitions. [2021-06-05 13:48:23,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:48:23,647 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 13:48:23,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:23,670 INFO L225 Difference]: With dead ends: 18642 [2021-06-05 13:48:23,670 INFO L226 Difference]: Without dead ends: 18588 [2021-06-05 13:48:23,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 237.6ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:48:23,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18588 states. [2021-06-05 13:48:23,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18588 to 15189. [2021-06-05 13:48:23,941 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 13:48:23,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15189 states to 15189 states and 39005 transitions. [2021-06-05 13:48:23,965 INFO L78 Accepts]: Start accepts. Automaton has 15189 states and 39005 transitions. Word has length 59 [2021-06-05 13:48:23,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:23,965 INFO L482 AbstractCegarLoop]: Abstraction has 15189 states and 39005 transitions. [2021-06-05 13:48:23,965 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 13:48:23,965 INFO L276 IsEmpty]: Start isEmpty. Operand 15189 states and 39005 transitions. [2021-06-05 13:48:23,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:23,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:23,976 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 13:48:24,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable932 [2021-06-05 13:48:24,177 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:24,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:24,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1443086082, now seen corresponding path program 273 times [2021-06-05 13:48:24,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:24,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129531788] [2021-06-05 13:48:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:24,256 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 13:48:24,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:24,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129531788] [2021-06-05 13:48:24,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129531788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:24,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614974350] [2021-06-05 13:48:24,256 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 13:48:24,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 13:48:24,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:24,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:24,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:24,377 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 13:48:24,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614974350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:24,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:24,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:48:24,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679830557] [2021-06-05 13:48:24,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:48:24,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:24,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:48:24,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:48:24,378 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 13:48:24,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:24,635 INFO L93 Difference]: Finished difference Result 17831 states and 43702 transitions. [2021-06-05 13:48:24,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:48:24,635 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 13:48:24,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:24,657 INFO L225 Difference]: With dead ends: 17831 [2021-06-05 13:48:24,657 INFO L226 Difference]: Without dead ends: 17807 [2021-06-05 13:48:24,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:48:24,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17807 states. [2021-06-05 13:48:24,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17807 to 15189. [2021-06-05 13:48:24,858 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 13:48:24,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15189 states to 15189 states and 38991 transitions. [2021-06-05 13:48:24,883 INFO L78 Accepts]: Start accepts. Automaton has 15189 states and 38991 transitions. Word has length 59 [2021-06-05 13:48:24,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:24,883 INFO L482 AbstractCegarLoop]: Abstraction has 15189 states and 38991 transitions. [2021-06-05 13:48:24,883 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 13:48:24,883 INFO L276 IsEmpty]: Start isEmpty. Operand 15189 states and 38991 transitions. [2021-06-05 13:48:24,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:24,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:24,894 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 13:48:25,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:25,094 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:25,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:25,094 INFO L82 PathProgramCache]: Analyzing trace with hash 65363507, now seen corresponding path program 274 times [2021-06-05 13:48:25,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:25,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234599507] [2021-06-05 13:48:25,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:25,208 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 13:48:25,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:25,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234599507] [2021-06-05 13:48:25,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234599507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:25,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160816311] [2021-06-05 13:48:25,209 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 13:48:25,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:48:25,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:25,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:48:25,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:25,325 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 13:48:25,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160816311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:25,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:25,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:48:25,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649783508] [2021-06-05 13:48:25,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:48:25,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:25,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:48:25,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:48:25,326 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 13:48:26,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:26,414 INFO L93 Difference]: Finished difference Result 23093 states and 55993 transitions. [2021-06-05 13:48:26,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 13:48:26,415 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 13:48:26,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:26,442 INFO L225 Difference]: With dead ends: 23093 [2021-06-05 13:48:26,442 INFO L226 Difference]: Without dead ends: 22913 [2021-06-05 13:48:26,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 428.4ms TimeCoverageRelationStatistics Valid=231, Invalid=1749, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 13:48:26,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22913 states. [2021-06-05 13:48:26,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22913 to 15680. [2021-06-05 13:48:26,678 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 13:48:26,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15680 states to 15680 states and 40270 transitions. [2021-06-05 13:48:26,703 INFO L78 Accepts]: Start accepts. Automaton has 15680 states and 40270 transitions. Word has length 59 [2021-06-05 13:48:26,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:26,703 INFO L482 AbstractCegarLoop]: Abstraction has 15680 states and 40270 transitions. [2021-06-05 13:48:26,703 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 13:48:26,703 INFO L276 IsEmpty]: Start isEmpty. Operand 15680 states and 40270 transitions. [2021-06-05 13:48:26,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:26,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:26,714 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 13:48:26,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:26,914 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:26,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:26,915 INFO L82 PathProgramCache]: Analyzing trace with hash 451966184, now seen corresponding path program 275 times [2021-06-05 13:48:26,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:26,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709834092] [2021-06-05 13:48:26,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:27,020 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 13:48:27,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:27,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709834092] [2021-06-05 13:48:27,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709834092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:27,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48449691] [2021-06-05 13:48:27,020 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 13:48:27,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 13:48:27,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:27,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:27,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:27,166 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 13:48:27,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48449691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:27,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:27,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 17 [2021-06-05 13:48:27,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367523277] [2021-06-05 13:48:27,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:48:27,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:27,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:48:27,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:48:27,167 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 13:48:27,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:27,490 INFO L93 Difference]: Finished difference Result 18578 states and 45476 transitions. [2021-06-05 13:48:27,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:48:27,490 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 13:48:27,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:27,514 INFO L225 Difference]: With dead ends: 18578 [2021-06-05 13:48:27,514 INFO L226 Difference]: Without dead ends: 18545 [2021-06-05 13:48:27,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:48:27,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18545 states. [2021-06-05 13:48:27,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18545 to 15680. [2021-06-05 13:48:27,720 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 13:48:27,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15680 states to 15680 states and 40261 transitions. [2021-06-05 13:48:27,745 INFO L78 Accepts]: Start accepts. Automaton has 15680 states and 40261 transitions. Word has length 59 [2021-06-05 13:48:27,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:27,746 INFO L482 AbstractCegarLoop]: Abstraction has 15680 states and 40261 transitions. [2021-06-05 13:48:27,746 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 13:48:27,746 INFO L276 IsEmpty]: Start isEmpty. Operand 15680 states and 40261 transitions. [2021-06-05 13:48:27,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:27,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:27,756 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 13:48:27,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable938,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:27,957 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:27,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:27,957 INFO L82 PathProgramCache]: Analyzing trace with hash 5671997, now seen corresponding path program 276 times [2021-06-05 13:48:27,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:27,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460006752] [2021-06-05 13:48:27,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:28,075 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 13:48:28,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:28,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460006752] [2021-06-05 13:48:28,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460006752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:28,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163118060] [2021-06-05 13:48:28,075 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 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 13:48:28,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 13:48:28,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:28,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:48:28,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:28,196 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 13:48:28,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163118060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:28,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:28,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:48:28,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503862980] [2021-06-05 13:48:28,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:48:28,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:28,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:48:28,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:48:28,197 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 13:48:29,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:29,707 INFO L93 Difference]: Finished difference Result 28722 states and 68889 transitions. [2021-06-05 13:48:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 13:48:29,707 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 13:48:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:29,742 INFO L225 Difference]: With dead ends: 28722 [2021-06-05 13:48:29,742 INFO L226 Difference]: Without dead ends: 28446 [2021-06-05 13:48:29,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 785.3ms TimeCoverageRelationStatistics Valid=501, Invalid=4191, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 13:48:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28446 states. [2021-06-05 13:48:30,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28446 to 16072. [2021-06-05 13:48:30,035 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 13:48:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16072 states to 16072 states and 41285 transitions. [2021-06-05 13:48:30,059 INFO L78 Accepts]: Start accepts. Automaton has 16072 states and 41285 transitions. Word has length 59 [2021-06-05 13:48:30,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:30,059 INFO L482 AbstractCegarLoop]: Abstraction has 16072 states and 41285 transitions. [2021-06-05 13:48:30,059 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 13:48:30,059 INFO L276 IsEmpty]: Start isEmpty. Operand 16072 states and 41285 transitions. [2021-06-05 13:48:30,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:30,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:30,069 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 13:48:30,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable943 [2021-06-05 13:48:30,270 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:30,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:30,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1899244866, now seen corresponding path program 277 times [2021-06-05 13:48:30,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:30,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159949260] [2021-06-05 13:48:30,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:30,368 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 13:48:30,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:30,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159949260] [2021-06-05 13:48:30,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159949260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:30,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449862627] [2021-06-05 13:48:30,369 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 13:48:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:30,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:30,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:30,484 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 13:48:30,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449862627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:30,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:30,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 13:48:30,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157448802] [2021-06-05 13:48:30,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:48:30,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:30,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:48:30,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:48:30,484 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 13:48:30,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:30,787 INFO L93 Difference]: Finished difference Result 18886 states and 46305 transitions. [2021-06-05 13:48:30,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:48:30,788 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 13:48:30,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:30,809 INFO L225 Difference]: With dead ends: 18886 [2021-06-05 13:48:30,809 INFO L226 Difference]: Without dead ends: 18844 [2021-06-05 13:48:30,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:48:30,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18844 states. [2021-06-05 13:48:30,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18844 to 15745. [2021-06-05 13:48:31,012 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 13:48:31,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15745 states to 15745 states and 40377 transitions. [2021-06-05 13:48:31,037 INFO L78 Accepts]: Start accepts. Automaton has 15745 states and 40377 transitions. Word has length 59 [2021-06-05 13:48:31,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:31,038 INFO L482 AbstractCegarLoop]: Abstraction has 15745 states and 40377 transitions. [2021-06-05 13:48:31,038 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 13:48:31,038 INFO L276 IsEmpty]: Start isEmpty. Operand 15745 states and 40377 transitions. [2021-06-05 13:48:31,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:31,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:31,048 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 13:48:31,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable944 [2021-06-05 13:48:31,249 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:31,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:31,249 INFO L82 PathProgramCache]: Analyzing trace with hash -147641869, now seen corresponding path program 278 times [2021-06-05 13:48:31,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:31,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414440939] [2021-06-05 13:48:31,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:31,382 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 13:48:31,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:31,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414440939] [2021-06-05 13:48:31,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414440939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:31,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968335556] [2021-06-05 13:48:31,382 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 13:48:31,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:48:31,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:31,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:48:31,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:31,498 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 13:48:31,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968335556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:31,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:31,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:48:31,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574131252] [2021-06-05 13:48:31,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:48:31,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:31,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:48:31,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:48:31,499 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 13:48:32,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:32,351 INFO L93 Difference]: Finished difference Result 22153 states and 53662 transitions. [2021-06-05 13:48:32,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:48:32,351 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 13:48:32,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:32,376 INFO L225 Difference]: With dead ends: 22153 [2021-06-05 13:48:32,377 INFO L226 Difference]: Without dead ends: 21775 [2021-06-05 13:48:32,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:48:32,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21775 states. [2021-06-05 13:48:32,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21775 to 14506. [2021-06-05 13:48:32,600 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 13:48:32,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14506 states to 14506 states and 37052 transitions. [2021-06-05 13:48:32,624 INFO L78 Accepts]: Start accepts. Automaton has 14506 states and 37052 transitions. Word has length 59 [2021-06-05 13:48:32,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:32,624 INFO L482 AbstractCegarLoop]: Abstraction has 14506 states and 37052 transitions. [2021-06-05 13:48:32,624 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 13:48:32,624 INFO L276 IsEmpty]: Start isEmpty. Operand 14506 states and 37052 transitions. [2021-06-05 13:48:32,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:32,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:32,634 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 13:48:32,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable950 [2021-06-05 13:48:32,835 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:32,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:32,835 INFO L82 PathProgramCache]: Analyzing trace with hash -385703386, now seen corresponding path program 130 times [2021-06-05 13:48:32,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:32,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008924432] [2021-06-05 13:48:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:32,903 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 13:48:32,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:32,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008924432] [2021-06-05 13:48:32,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008924432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:32,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967101713] [2021-06-05 13:48:32,903 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 13:48:32,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:48:32,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:32,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:32,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:33,019 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 13:48:33,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967101713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:33,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:33,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 13:48:33,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419529181] [2021-06-05 13:48:33,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:48:33,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:33,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:48:33,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:48:33,020 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 13:48:33,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:33,288 INFO L93 Difference]: Finished difference Result 18216 states and 44603 transitions. [2021-06-05 13:48:33,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:48:33,288 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 13:48:33,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:33,309 INFO L225 Difference]: With dead ends: 18216 [2021-06-05 13:48:33,309 INFO L226 Difference]: Without dead ends: 18202 [2021-06-05 13:48:33,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:48:33,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18202 states. [2021-06-05 13:48:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18202 to 14941. [2021-06-05 13:48:33,518 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 13:48:33,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14941 states to 14941 states and 38236 transitions. [2021-06-05 13:48:33,546 INFO L78 Accepts]: Start accepts. Automaton has 14941 states and 38236 transitions. Word has length 59 [2021-06-05 13:48:33,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:33,547 INFO L482 AbstractCegarLoop]: Abstraction has 14941 states and 38236 transitions. [2021-06-05 13:48:33,547 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 13:48:33,547 INFO L276 IsEmpty]: Start isEmpty. Operand 14941 states and 38236 transitions. [2021-06-05 13:48:33,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:33,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:33,559 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 13:48:33,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable951,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:33,759 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:33,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:33,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1007583796, now seen corresponding path program 131 times [2021-06-05 13:48:33,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:33,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408685261] [2021-06-05 13:48:33,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:33,828 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 13:48:33,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:33,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408685261] [2021-06-05 13:48:33,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408685261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:33,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052527290] [2021-06-05 13:48:33,828 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 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 13:48:33,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 13:48:33,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:33,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:33,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:33,969 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 13:48:33,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052527290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:33,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:33,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-05 13:48:33,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073298886] [2021-06-05 13:48:33,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:48:33,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:33,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:48:33,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:48:33,970 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 13:48:34,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:34,273 INFO L93 Difference]: Finished difference Result 23419 states and 56616 transitions. [2021-06-05 13:48:34,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:48:34,273 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 13:48:34,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:34,300 INFO L225 Difference]: With dead ends: 23419 [2021-06-05 13:48:34,300 INFO L226 Difference]: Without dead ends: 23419 [2021-06-05 13:48:34,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=162, Invalid=218, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:48:34,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23419 states. [2021-06-05 13:48:34,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23419 to 14952. [2021-06-05 13:48:34,551 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 13:48:34,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14952 states to 14952 states and 38269 transitions. [2021-06-05 13:48:34,579 INFO L78 Accepts]: Start accepts. Automaton has 14952 states and 38269 transitions. Word has length 59 [2021-06-05 13:48:34,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:34,579 INFO L482 AbstractCegarLoop]: Abstraction has 14952 states and 38269 transitions. [2021-06-05 13:48:34,579 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 13:48:34,579 INFO L276 IsEmpty]: Start isEmpty. Operand 14952 states and 38269 transitions. [2021-06-05 13:48:34,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:34,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:34,591 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 13:48:34,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable953,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:34,791 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:34,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:34,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1649811044, now seen corresponding path program 132 times [2021-06-05 13:48:34,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:34,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970622968] [2021-06-05 13:48:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:34,872 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 13:48:34,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:34,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970622968] [2021-06-05 13:48:34,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970622968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:34,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405712535] [2021-06-05 13:48:34,872 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 13:48:34,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 13:48:34,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:34,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:34,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:34,999 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 13:48:35,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405712535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:35,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:35,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:48:35,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222299254] [2021-06-05 13:48:35,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:48:35,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:35,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:48:35,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:48:35,000 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 13:48:35,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:35,386 INFO L93 Difference]: Finished difference Result 25599 states and 61804 transitions. [2021-06-05 13:48:35,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:48:35,386 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 13:48:35,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:35,422 INFO L225 Difference]: With dead ends: 25599 [2021-06-05 13:48:35,422 INFO L226 Difference]: Without dead ends: 25599 [2021-06-05 13:48:35,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=203, Invalid=303, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:48:35,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25599 states. [2021-06-05 13:48:35,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25599 to 14991. [2021-06-05 13:48:35,675 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 13:48:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14991 states to 14991 states and 38394 transitions. [2021-06-05 13:48:35,700 INFO L78 Accepts]: Start accepts. Automaton has 14991 states and 38394 transitions. Word has length 59 [2021-06-05 13:48:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:35,701 INFO L482 AbstractCegarLoop]: Abstraction has 14991 states and 38394 transitions. [2021-06-05 13:48:35,701 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 13:48:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 14991 states and 38394 transitions. [2021-06-05 13:48:35,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:35,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:35,711 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 13:48:35,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-06-05 13:48:35,912 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:35,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:35,912 INFO L82 PathProgramCache]: Analyzing trace with hash -40184120, now seen corresponding path program 133 times [2021-06-05 13:48:35,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:35,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348699504] [2021-06-05 13:48:35,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:36,003 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 13:48:36,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:36,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348699504] [2021-06-05 13:48:36,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348699504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:36,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286305793] [2021-06-05 13:48:36,004 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 13:48:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:36,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:36,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:36,126 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 13:48:36,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286305793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:36,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:36,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 13:48:36,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465741058] [2021-06-05 13:48:36,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:48:36,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:36,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:48:36,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:48:36,127 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 13:48:36,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:36,513 INFO L93 Difference]: Finished difference Result 25335 states and 61221 transitions. [2021-06-05 13:48:36,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:48:36,514 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 13:48:36,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:36,548 INFO L225 Difference]: With dead ends: 25335 [2021-06-05 13:48:36,549 INFO L226 Difference]: Without dead ends: 25335 [2021-06-05 13:48:36,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 183.2ms TimeCoverageRelationStatistics Valid=254, Invalid=396, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:48:36,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25335 states. [2021-06-05 13:48:36,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25335 to 15025. [2021-06-05 13:48:36,810 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 13:48:36,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15025 states to 15025 states and 38498 transitions. [2021-06-05 13:48:36,836 INFO L78 Accepts]: Start accepts. Automaton has 15025 states and 38498 transitions. Word has length 59 [2021-06-05 13:48:36,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:36,837 INFO L482 AbstractCegarLoop]: Abstraction has 15025 states and 38498 transitions. [2021-06-05 13:48:36,837 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 13:48:36,837 INFO L276 IsEmpty]: Start isEmpty. Operand 15025 states and 38498 transitions. [2021-06-05 13:48:36,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:36,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:36,847 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 13:48:37,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable955 [2021-06-05 13:48:37,048 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:37,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:37,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1079471132, now seen corresponding path program 134 times [2021-06-05 13:48:37,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:37,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809426650] [2021-06-05 13:48:37,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:37,150 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 13:48:37,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:37,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809426650] [2021-06-05 13:48:37,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809426650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:37,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821483168] [2021-06-05 13:48:37,150 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 13:48:37,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:48:37,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:37,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:37,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:37,350 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 13:48:37,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821483168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:37,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:37,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 13:48:37,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027237371] [2021-06-05 13:48:37,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:48:37,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:37,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:48:37,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:48:37,351 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 13:48:37,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:37,806 INFO L93 Difference]: Finished difference Result 22714 states and 55093 transitions. [2021-06-05 13:48:37,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:48:37,806 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 13:48:37,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:37,832 INFO L225 Difference]: With dead ends: 22714 [2021-06-05 13:48:37,833 INFO L226 Difference]: Without dead ends: 22714 [2021-06-05 13:48:37,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 200.0ms TimeCoverageRelationStatistics Valid=268, Invalid=434, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:48:37,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22714 states. [2021-06-05 13:48:38,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22714 to 15046. [2021-06-05 13:48:38,057 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 13:48:38,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15046 states to 15046 states and 38555 transitions. [2021-06-05 13:48:38,081 INFO L78 Accepts]: Start accepts. Automaton has 15046 states and 38555 transitions. Word has length 59 [2021-06-05 13:48:38,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:38,081 INFO L482 AbstractCegarLoop]: Abstraction has 15046 states and 38555 transitions. [2021-06-05 13:48:38,081 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 13:48:38,082 INFO L276 IsEmpty]: Start isEmpty. Operand 15046 states and 38555 transitions. [2021-06-05 13:48:38,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:38,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:38,092 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 13:48:38,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:38,292 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:38,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:38,292 INFO L82 PathProgramCache]: Analyzing trace with hash -59608760, now seen corresponding path program 135 times [2021-06-05 13:48:38,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:38,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680030216] [2021-06-05 13:48:38,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:38,406 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 13:48:38,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:38,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680030216] [2021-06-05 13:48:38,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680030216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:38,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703900263] [2021-06-05 13:48:38,406 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 13:48:38,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 13:48:38,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:38,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:38,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:38,537 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 13:48:38,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703900263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:38,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:38,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 13:48:38,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783969245] [2021-06-05 13:48:38,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:48:38,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:38,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:48:38,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:48:38,538 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 13:48:38,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:38,931 INFO L93 Difference]: Finished difference Result 18929 states and 46502 transitions. [2021-06-05 13:48:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:48:38,932 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 13:48:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:38,954 INFO L225 Difference]: With dead ends: 18929 [2021-06-05 13:48:38,954 INFO L226 Difference]: Without dead ends: 18929 [2021-06-05 13:48:38,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 196.6ms TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:48:38,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18929 states. [2021-06-05 13:48:39,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18929 to 14402. [2021-06-05 13:48:39,158 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 13:48:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14402 states to 14402 states and 36761 transitions. [2021-06-05 13:48:39,181 INFO L78 Accepts]: Start accepts. Automaton has 14402 states and 36761 transitions. Word has length 59 [2021-06-05 13:48:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:39,181 INFO L482 AbstractCegarLoop]: Abstraction has 14402 states and 36761 transitions. [2021-06-05 13:48:39,181 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 13:48:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states and 36761 transitions. [2021-06-05 13:48:39,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:39,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:39,192 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 13:48:39,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable957 [2021-06-05 13:48:39,392 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:39,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:39,392 INFO L82 PathProgramCache]: Analyzing trace with hash 601775784, now seen corresponding path program 279 times [2021-06-05 13:48:39,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:39,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307246171] [2021-06-05 13:48:39,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:39,504 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 13:48:39,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:39,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307246171] [2021-06-05 13:48:39,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307246171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:39,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336002355] [2021-06-05 13:48:39,504 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 13:48:39,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 13:48:39,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:39,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:39,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:39,626 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 13:48:39,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336002355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:39,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:39,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 13:48:39,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501512351] [2021-06-05 13:48:39,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:48:39,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:39,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:48:39,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:48:39,627 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 13:48:39,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:39,935 INFO L93 Difference]: Finished difference Result 16717 states and 40878 transitions. [2021-06-05 13:48:39,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:48:39,935 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 13:48:39,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:39,955 INFO L225 Difference]: With dead ends: 16717 [2021-06-05 13:48:39,955 INFO L226 Difference]: Without dead ends: 16672 [2021-06-05 13:48:39,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:48:39,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16672 states. [2021-06-05 13:48:40,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16672 to 14402. [2021-06-05 13:48:40,145 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 13:48:40,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14402 states to 14402 states and 36752 transitions. [2021-06-05 13:48:40,168 INFO L78 Accepts]: Start accepts. Automaton has 14402 states and 36752 transitions. Word has length 59 [2021-06-05 13:48:40,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:40,168 INFO L482 AbstractCegarLoop]: Abstraction has 14402 states and 36752 transitions. [2021-06-05 13:48:40,168 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 13:48:40,168 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states and 36752 transitions. [2021-06-05 13:48:40,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:40,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:40,178 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 13:48:40,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable958,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:40,379 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:40,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:40,379 INFO L82 PathProgramCache]: Analyzing trace with hash 972677468, now seen corresponding path program 280 times [2021-06-05 13:48:40,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:40,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847654242] [2021-06-05 13:48:40,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:40,451 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 13:48:40,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:40,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847654242] [2021-06-05 13:48:40,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847654242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:40,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159440416] [2021-06-05 13:48:40,451 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 13:48:40,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:48:40,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:40,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:40,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:40,564 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 13:48:40,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159440416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:40,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:40,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 13:48:40,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938939962] [2021-06-05 13:48:40,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:48:40,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:40,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:48:40,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:48:40,565 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 13:48:40,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:40,746 INFO L93 Difference]: Finished difference Result 17320 states and 42003 transitions. [2021-06-05 13:48:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:48:40,746 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 13:48:40,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:40,765 INFO L225 Difference]: With dead ends: 17320 [2021-06-05 13:48:40,765 INFO L226 Difference]: Without dead ends: 17317 [2021-06-05 13:48:40,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:48:40,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17317 states. [2021-06-05 13:48:40,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17317 to 14390. [2021-06-05 13:48:40,950 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 13:48:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14390 states to 14390 states and 36705 transitions. [2021-06-05 13:48:40,972 INFO L78 Accepts]: Start accepts. Automaton has 14390 states and 36705 transitions. Word has length 59 [2021-06-05 13:48:40,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:40,972 INFO L482 AbstractCegarLoop]: Abstraction has 14390 states and 36705 transitions. [2021-06-05 13:48:40,972 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 13:48:40,972 INFO L276 IsEmpty]: Start isEmpty. Operand 14390 states and 36705 transitions. [2021-06-05 13:48:40,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:40,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:40,982 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 13:48:41,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-06-05 13:48:41,182 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:41,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:41,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1179740034, now seen corresponding path program 281 times [2021-06-05 13:48:41,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:41,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041578458] [2021-06-05 13:48:41,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:41,251 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 13:48:41,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:41,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041578458] [2021-06-05 13:48:41,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041578458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:41,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210576448] [2021-06-05 13:48:41,251 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 13:48:41,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 13:48:41,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:41,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:41,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:41,475 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 13:48:41,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210576448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:41,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:41,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-06-05 13:48:41,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775543926] [2021-06-05 13:48:41,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:48:41,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:41,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:48:41,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:48:41,476 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 13:48:41,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:41,749 INFO L93 Difference]: Finished difference Result 17479 states and 42286 transitions. [2021-06-05 13:48:41,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:48:41,749 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 13:48:41,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:41,769 INFO L225 Difference]: With dead ends: 17479 [2021-06-05 13:48:41,769 INFO L226 Difference]: Without dead ends: 17461 [2021-06-05 13:48:41,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:48:41,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17461 states. [2021-06-05 13:48:41,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17461 to 14390. [2021-06-05 13:48:41,954 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 13:48:41,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14390 states to 14390 states and 36682 transitions. [2021-06-05 13:48:41,976 INFO L78 Accepts]: Start accepts. Automaton has 14390 states and 36682 transitions. Word has length 59 [2021-06-05 13:48:41,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:41,976 INFO L482 AbstractCegarLoop]: Abstraction has 14390 states and 36682 transitions. [2021-06-05 13:48:41,976 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 13:48:41,976 INFO L276 IsEmpty]: Start isEmpty. Operand 14390 states and 36682 transitions. [2021-06-05 13:48:41,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:41,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:41,987 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 13:48:42,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable967,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:42,187 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:42,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:42,187 INFO L82 PathProgramCache]: Analyzing trace with hash -268259979, now seen corresponding path program 282 times [2021-06-05 13:48:42,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:42,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021319476] [2021-06-05 13:48:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:42,277 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 13:48:42,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:42,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021319476] [2021-06-05 13:48:42,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021319476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:42,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539582714] [2021-06-05 13:48:42,278 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 13:48:42,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 13:48:42,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:42,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:48:42,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:42,435 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 13:48:42,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539582714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:42,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:42,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 13:48:42,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371267514] [2021-06-05 13:48:42,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:48:42,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:42,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:48:42,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:48:42,436 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 13:48:43,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:43,209 INFO L93 Difference]: Finished difference Result 16064 states and 39766 transitions. [2021-06-05 13:48:43,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:48:43,209 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 13:48:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:43,226 INFO L225 Difference]: With dead ends: 16064 [2021-06-05 13:48:43,226 INFO L226 Difference]: Without dead ends: 15797 [2021-06-05 13:48:43,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:48:43,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15797 states. [2021-06-05 13:48:43,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15797 to 14403. [2021-06-05 13:48:43,387 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 13:48:43,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14403 states to 14403 states and 36587 transitions. [2021-06-05 13:48:43,408 INFO L78 Accepts]: Start accepts. Automaton has 14403 states and 36587 transitions. Word has length 59 [2021-06-05 13:48:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:43,409 INFO L482 AbstractCegarLoop]: Abstraction has 14403 states and 36587 transitions. [2021-06-05 13:48:43,409 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 13:48:43,409 INFO L276 IsEmpty]: Start isEmpty. Operand 14403 states and 36587 transitions. [2021-06-05 13:48:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:43,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:43,419 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 13:48:43,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable970 [2021-06-05 13:48:43,619 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:43,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:43,619 INFO L82 PathProgramCache]: Analyzing trace with hash -881796159, now seen corresponding path program 283 times [2021-06-05 13:48:43,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:43,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397457283] [2021-06-05 13:48:43,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:43,730 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 13:48:43,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:43,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397457283] [2021-06-05 13:48:43,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397457283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:43,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831341400] [2021-06-05 13:48:43,730 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 13:48:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:43,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:48:43,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:43,846 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 13:48:43,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831341400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:43,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:43,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:48:43,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844500501] [2021-06-05 13:48:43,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:48:43,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:43,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:48:43,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:48:43,847 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 13:48:44,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:44,444 INFO L93 Difference]: Finished difference Result 16239 states and 40254 transitions. [2021-06-05 13:48:44,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:48:44,444 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 13:48:44,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:44,463 INFO L225 Difference]: With dead ends: 16239 [2021-06-05 13:48:44,463 INFO L226 Difference]: Without dead ends: 16227 [2021-06-05 13:48:44,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:48:44,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16227 states. [2021-06-05 13:48:44,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16227 to 14558. [2021-06-05 13:48:44,650 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 13:48:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14558 states to 14558 states and 36978 transitions. [2021-06-05 13:48:44,673 INFO L78 Accepts]: Start accepts. Automaton has 14558 states and 36978 transitions. Word has length 59 [2021-06-05 13:48:44,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:44,673 INFO L482 AbstractCegarLoop]: Abstraction has 14558 states and 36978 transitions. [2021-06-05 13:48:44,673 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 13:48:44,673 INFO L276 IsEmpty]: Start isEmpty. Operand 14558 states and 36978 transitions. [2021-06-05 13:48:44,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:44,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:44,683 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 13:48:44,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable971,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:44,883 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:44,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:44,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1039095646, now seen corresponding path program 136 times [2021-06-05 13:48:44,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:44,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175604661] [2021-06-05 13:48:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:44,968 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 13:48:44,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:44,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175604661] [2021-06-05 13:48:44,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175604661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:44,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447195417] [2021-06-05 13:48:44,969 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 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 13:48:45,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:48:45,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:45,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:45,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:45,111 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 13:48:45,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447195417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:45,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:45,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 13:48:45,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913199157] [2021-06-05 13:48:45,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:48:45,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:45,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:48:45,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:48:45,112 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 13:48:45,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:45,372 INFO L93 Difference]: Finished difference Result 17769 states and 43570 transitions. [2021-06-05 13:48:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:48:45,372 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 13:48:45,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:45,395 INFO L225 Difference]: With dead ends: 17769 [2021-06-05 13:48:45,395 INFO L226 Difference]: Without dead ends: 17739 [2021-06-05 13:48:45,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:48:45,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17739 states. [2021-06-05 13:48:45,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17739 to 15059. [2021-06-05 13:48:45,585 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 13:48:45,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15059 states to 15059 states and 38331 transitions. [2021-06-05 13:48:45,696 INFO L78 Accepts]: Start accepts. Automaton has 15059 states and 38331 transitions. Word has length 59 [2021-06-05 13:48:45,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:45,696 INFO L482 AbstractCegarLoop]: Abstraction has 15059 states and 38331 transitions. [2021-06-05 13:48:45,696 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 13:48:45,696 INFO L276 IsEmpty]: Start isEmpty. Operand 15059 states and 38331 transitions. [2021-06-05 13:48:45,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:45,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:45,705 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 13:48:45,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-06-05 13:48:45,905 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:45,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:45,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1260121175, now seen corresponding path program 284 times [2021-06-05 13:48:45,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:45,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058752429] [2021-06-05 13:48:45,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:45,998 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 13:48:45,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:45,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058752429] [2021-06-05 13:48:45,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058752429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:45,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003433053] [2021-06-05 13:48:45,998 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 13:48:46,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:48:46,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:46,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:48:46,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:46,112 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 13:48:46,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003433053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:46,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:46,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:48:46,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580544090] [2021-06-05 13:48:46,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:48:46,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:46,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:48:46,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:48:46,113 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 13:48:46,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:46,892 INFO L93 Difference]: Finished difference Result 19111 states and 46968 transitions. [2021-06-05 13:48:46,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:48:46,893 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 13:48:46,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:46,915 INFO L225 Difference]: With dead ends: 19111 [2021-06-05 13:48:46,915 INFO L226 Difference]: Without dead ends: 19057 [2021-06-05 13:48:46,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 255.9ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:48:46,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19057 states. [2021-06-05 13:48:47,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19057 to 15532. [2021-06-05 13:48:47,143 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 13:48:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15532 states to 15532 states and 39622 transitions. [2021-06-05 13:48:47,168 INFO L78 Accepts]: Start accepts. Automaton has 15532 states and 39622 transitions. Word has length 59 [2021-06-05 13:48:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:47,169 INFO L482 AbstractCegarLoop]: Abstraction has 15532 states and 39622 transitions. [2021-06-05 13:48:47,169 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 13:48:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 15532 states and 39622 transitions. [2021-06-05 13:48:47,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:47,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:47,179 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 13:48:47,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable975 [2021-06-05 13:48:47,380 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:47,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:47,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1502287012, now seen corresponding path program 285 times [2021-06-05 13:48:47,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:47,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106246215] [2021-06-05 13:48:47,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:47,457 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 13:48:47,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:47,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106246215] [2021-06-05 13:48:47,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106246215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:47,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638131933] [2021-06-05 13:48:47,457 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 13:48:47,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 13:48:47,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:47,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:47,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:47,574 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 13:48:47,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638131933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:47,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:47,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:48:47,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015821256] [2021-06-05 13:48:47,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:48:47,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:47,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:48:47,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:48:47,574 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 13:48:47,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:47,809 INFO L93 Difference]: Finished difference Result 18411 states and 44785 transitions. [2021-06-05 13:48:47,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:48:47,810 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 13:48:47,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:47,833 INFO L225 Difference]: With dead ends: 18411 [2021-06-05 13:48:47,833 INFO L226 Difference]: Without dead ends: 18387 [2021-06-05 13:48:47,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:48:47,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18387 states. [2021-06-05 13:48:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18387 to 15532. [2021-06-05 13:48:48,021 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 13:48:48,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15532 states to 15532 states and 39603 transitions. [2021-06-05 13:48:48,044 INFO L78 Accepts]: Start accepts. Automaton has 15532 states and 39603 transitions. Word has length 59 [2021-06-05 13:48:48,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:48,044 INFO L482 AbstractCegarLoop]: Abstraction has 15532 states and 39603 transitions. [2021-06-05 13:48:48,045 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 13:48:48,045 INFO L276 IsEmpty]: Start isEmpty. Operand 15532 states and 39603 transitions. [2021-06-05 13:48:48,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:48,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:48,055 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 13:48:48,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable976 [2021-06-05 13:48:48,255 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:48,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:48,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1414957709, now seen corresponding path program 286 times [2021-06-05 13:48:48,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:48,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848114600] [2021-06-05 13:48:48,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:48,362 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 13:48:48,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:48,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848114600] [2021-06-05 13:48:48,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848114600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:48,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244151465] [2021-06-05 13:48:48,363 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 13:48:48,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:48:48,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:48,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:48:48,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:48,479 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 13:48:48,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244151465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:48,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:48,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:48:48,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468437076] [2021-06-05 13:48:48,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:48:48,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:48,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:48:48,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:48:48,480 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 13:48:49,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:49,613 INFO L93 Difference]: Finished difference Result 24361 states and 58995 transitions. [2021-06-05 13:48:49,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 13:48:49,614 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 13:48:49,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:49,641 INFO L225 Difference]: With dead ends: 24361 [2021-06-05 13:48:49,641 INFO L226 Difference]: Without dead ends: 24193 [2021-06-05 13:48:49,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 486.2ms TimeCoverageRelationStatistics Valid=279, Invalid=2271, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:48:49,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24193 states. [2021-06-05 13:48:49,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24193 to 16448. [2021-06-05 13:48:49,885 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 13:48:49,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16448 states to 16448 states and 42038 transitions. [2021-06-05 13:48:49,913 INFO L78 Accepts]: Start accepts. Automaton has 16448 states and 42038 transitions. Word has length 59 [2021-06-05 13:48:49,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:49,913 INFO L482 AbstractCegarLoop]: Abstraction has 16448 states and 42038 transitions. [2021-06-05 13:48:49,913 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 13:48:49,913 INFO L276 IsEmpty]: Start isEmpty. Operand 16448 states and 42038 transitions. [2021-06-05 13:48:49,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:49,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:49,926 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 13:48:50,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable980,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:50,126 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:50,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1801560386, now seen corresponding path program 287 times [2021-06-05 13:48:50,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:50,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946547291] [2021-06-05 13:48:50,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:50,292 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 13:48:50,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:50,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946547291] [2021-06-05 13:48:50,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946547291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:50,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82348348] [2021-06-05 13:48:50,292 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 13:48:50,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 13:48:50,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:50,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:50,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:50,430 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 13:48:50,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82348348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:50,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:50,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2021-06-05 13:48:50,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382776068] [2021-06-05 13:48:50,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:48:50,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:50,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:48:50,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:48:50,430 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 13:48:50,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:50,712 INFO L93 Difference]: Finished difference Result 19584 states and 47707 transitions. [2021-06-05 13:48:50,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:48:50,712 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 13:48:50,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:50,734 INFO L225 Difference]: With dead ends: 19584 [2021-06-05 13:48:50,734 INFO L226 Difference]: Without dead ends: 19551 [2021-06-05 13:48:50,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:48:50,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19551 states. [2021-06-05 13:48:50,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19551 to 16448. [2021-06-05 13:48:50,951 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 13:48:50,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16448 states to 16448 states and 42023 transitions. [2021-06-05 13:48:50,979 INFO L78 Accepts]: Start accepts. Automaton has 16448 states and 42023 transitions. Word has length 59 [2021-06-05 13:48:50,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:50,979 INFO L482 AbstractCegarLoop]: Abstraction has 16448 states and 42023 transitions. [2021-06-05 13:48:50,979 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 13:48:50,979 INFO L276 IsEmpty]: Start isEmpty. Operand 16448 states and 42023 transitions. [2021-06-05 13:48:50,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:50,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:50,990 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 13:48:51,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable981 [2021-06-05 13:48:51,190 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:51,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:51,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1355266199, now seen corresponding path program 288 times [2021-06-05 13:48:51,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:51,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777212401] [2021-06-05 13:48:51,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:51,307 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 13:48:51,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:51,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777212401] [2021-06-05 13:48:51,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777212401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:51,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597446986] [2021-06-05 13:48:51,307 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 13:48:51,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 13:48:51,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:51,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:48:51,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:51,426 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 13:48:51,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597446986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:51,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:51,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:48:51,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161516687] [2021-06-05 13:48:51,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:48:51,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:51,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:48:51,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:48:51,427 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 13:48:53,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:53,178 INFO L93 Difference]: Finished difference Result 35626 states and 84935 transitions. [2021-06-05 13:48:53,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 13:48:53,178 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 13:48:53,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:53,221 INFO L225 Difference]: With dead ends: 35626 [2021-06-05 13:48:53,221 INFO L226 Difference]: Without dead ends: 35104 [2021-06-05 13:48:53,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 923.4ms TimeCoverageRelationStatistics Valid=657, Invalid=6149, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 13:48:53,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35104 states. [2021-06-05 13:48:53,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35104 to 17932. [2021-06-05 13:48:53,548 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 13:48:53,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17932 states to 17932 states and 45917 transitions. [2021-06-05 13:48:53,576 INFO L78 Accepts]: Start accepts. Automaton has 17932 states and 45917 transitions. Word has length 59 [2021-06-05 13:48:53,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:53,576 INFO L482 AbstractCegarLoop]: Abstraction has 17932 states and 45917 transitions. [2021-06-05 13:48:53,576 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 13:48:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 17932 states and 45917 transitions. [2021-06-05 13:48:53,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:53,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:53,587 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 13:48:53,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable986,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:53,787 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:53,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:53,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1046128228, now seen corresponding path program 289 times [2021-06-05 13:48:53,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:53,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837078095] [2021-06-05 13:48:53,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:53,887 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 13:48:53,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:53,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837078095] [2021-06-05 13:48:53,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837078095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:53,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422947510] [2021-06-05 13:48:53,888 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 13:48:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:53,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:53,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:54,003 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 13:48:54,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422947510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:54,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:54,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 13:48:54,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944980439] [2021-06-05 13:48:54,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:48:54,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:54,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:48:54,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:48:54,004 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 13:48:54,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:54,284 INFO L93 Difference]: Finished difference Result 21190 states and 51795 transitions. [2021-06-05 13:48:54,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:48:54,284 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 13:48:54,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:54,307 INFO L225 Difference]: With dead ends: 21190 [2021-06-05 13:48:54,307 INFO L226 Difference]: Without dead ends: 21148 [2021-06-05 13:48:54,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:48:54,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21148 states. [2021-06-05 13:48:54,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21148 to 17932. [2021-06-05 13:48:54,575 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 13:48:54,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17932 states to 17932 states and 45902 transitions. [2021-06-05 13:48:54,603 INFO L78 Accepts]: Start accepts. Automaton has 17932 states and 45902 transitions. Word has length 59 [2021-06-05 13:48:54,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:54,603 INFO L482 AbstractCegarLoop]: Abstraction has 17932 states and 45902 transitions. [2021-06-05 13:48:54,603 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 13:48:54,603 INFO L276 IsEmpty]: Start isEmpty. Operand 17932 states and 45902 transitions. [2021-06-05 13:48:54,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:54,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:54,614 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 13:48:54,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable987 [2021-06-05 13:48:54,814 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:54,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:54,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1201952333, now seen corresponding path program 290 times [2021-06-05 13:48:54,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:54,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828203629] [2021-06-05 13:48:54,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:54,940 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 13:48:54,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:54,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828203629] [2021-06-05 13:48:54,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828203629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:54,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469674540] [2021-06-05 13:48:54,941 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 13:48:54,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:48:54,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:54,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:48:54,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:55,054 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 13:48:55,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469674540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:55,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:55,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:48:55,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759422647] [2021-06-05 13:48:55,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:48:55,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:55,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:48:55,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:48:55,055 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 13:48:57,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:57,702 INFO L93 Difference]: Finished difference Result 45251 states and 107889 transitions. [2021-06-05 13:48:57,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-06-05 13:48:57,703 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 13:48:57,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:57,762 INFO L225 Difference]: With dead ends: 45251 [2021-06-05 13:48:57,763 INFO L226 Difference]: Without dead ends: 44633 [2021-06-05 13:48:57,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6679 ImplicationChecksByTransitivity, 1725.3ms TimeCoverageRelationStatistics Valid=1467, Invalid=15563, Unknown=0, NotChecked=0, Total=17030 [2021-06-05 13:48:57,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44633 states. [2021-06-05 13:48:58,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44633 to 19324. [2021-06-05 13:48:58,152 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 13:48:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19324 states to 19324 states and 49528 transitions. [2021-06-05 13:48:58,182 INFO L78 Accepts]: Start accepts. Automaton has 19324 states and 49528 transitions. Word has length 59 [2021-06-05 13:48:58,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:58,182 INFO L482 AbstractCegarLoop]: Abstraction has 19324 states and 49528 transitions. [2021-06-05 13:48:58,182 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 13:48:58,183 INFO L276 IsEmpty]: Start isEmpty. Operand 19324 states and 49528 transitions. [2021-06-05 13:48:58,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:58,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:58,194 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 13:48:58,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable993 [2021-06-05 13:48:58,394 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:58,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:58,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1951369986, now seen corresponding path program 291 times [2021-06-05 13:48:58,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:58,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800769519] [2021-06-05 13:48:58,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:58,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:58,504 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 13:48:58,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:58,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800769519] [2021-06-05 13:48:58,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800769519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:58,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754665903] [2021-06-05 13:48:58,504 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 13:48:58,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 13:48:58,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:58,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:48:58,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:58,623 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 13:48:58,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754665903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:58,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:58,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 13:48:58,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067872082] [2021-06-05 13:48:58,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:48:58,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:58,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:48:58,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:48:58,624 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 13:48:58,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:58,921 INFO L93 Difference]: Finished difference Result 22688 states and 55618 transitions. [2021-06-05 13:48:58,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:48:58,922 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 13:48:58,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:58,952 INFO L225 Difference]: With dead ends: 22688 [2021-06-05 13:48:58,952 INFO L226 Difference]: Without dead ends: 22637 [2021-06-05 13:48:58,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:48:58,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22637 states. [2021-06-05 13:48:59,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22637 to 18993. [2021-06-05 13:48:59,281 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 13:48:59,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18993 states to 18993 states and 48619 transitions. [2021-06-05 13:48:59,313 INFO L78 Accepts]: Start accepts. Automaton has 18993 states and 48619 transitions. Word has length 59 [2021-06-05 13:48:59,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:59,313 INFO L482 AbstractCegarLoop]: Abstraction has 18993 states and 48619 transitions. [2021-06-05 13:48:59,313 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 13:48:59,313 INFO L276 IsEmpty]: Start isEmpty. Operand 18993 states and 48619 transitions. [2021-06-05 13:48:59,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:48:59,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:59,325 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 13:48:59,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-06-05 13:48:59,526 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:59,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:59,526 INFO L82 PathProgramCache]: Analyzing trace with hash -621194025, now seen corresponding path program 292 times [2021-06-05 13:48:59,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:59,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476412400] [2021-06-05 13:48:59,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:59,667 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 13:48:59,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:59,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476412400] [2021-06-05 13:48:59,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476412400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:59,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119432951] [2021-06-05 13:48:59,667 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 13:48:59,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:48:59,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:59,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:48:59,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:59,781 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 13:48:59,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119432951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:59,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:59,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 13:48:59,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071425141] [2021-06-05 13:48:59,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:48:59,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:59,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:48:59,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:48:59,781 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 13:49:00,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:00,700 INFO L93 Difference]: Finished difference Result 27005 states and 64480 transitions. [2021-06-05 13:49:00,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:49:00,700 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 13:49:00,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:00,728 INFO L225 Difference]: With dead ends: 27005 [2021-06-05 13:49:00,728 INFO L226 Difference]: Without dead ends: 26165 [2021-06-05 13:49:00,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 376.4ms TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:49:00,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26165 states. [2021-06-05 13:49:00,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26165 to 14615. [2021-06-05 13:49:00,936 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 13:49:00,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14615 states to 14615 states and 36957 transitions. [2021-06-05 13:49:00,957 INFO L78 Accepts]: Start accepts. Automaton has 14615 states and 36957 transitions. Word has length 59 [2021-06-05 13:49:00,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:00,957 INFO L482 AbstractCegarLoop]: Abstraction has 14615 states and 36957 transitions. [2021-06-05 13:49:00,957 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 13:49:00,958 INFO L276 IsEmpty]: Start isEmpty. Operand 14615 states and 36957 transitions. [2021-06-05 13:49:00,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:00,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:00,967 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 13:49:01,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1001 [2021-06-05 13:49:01,167 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:01,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:01,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1481135952, now seen corresponding path program 137 times [2021-06-05 13:49:01,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:01,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906676742] [2021-06-05 13:49:01,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:01,237 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 13:49:01,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:01,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906676742] [2021-06-05 13:49:01,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906676742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:01,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084780645] [2021-06-05 13:49:01,237 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 13:49:01,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 13:49:01,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:01,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:01,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:01,375 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 13:49:01,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084780645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:01,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:01,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-05 13:49:01,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129333691] [2021-06-05 13:49:01,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:49:01,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:01,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:49:01,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:49:01,376 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 13:49:01,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:01,659 INFO L93 Difference]: Finished difference Result 22169 states and 53449 transitions. [2021-06-05 13:49:01,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:49:01,660 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 13:49:01,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:01,685 INFO L225 Difference]: With dead ends: 22169 [2021-06-05 13:49:01,685 INFO L226 Difference]: Without dead ends: 22169 [2021-06-05 13:49:01,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=180, Invalid=240, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:49:01,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22169 states. [2021-06-05 13:49:01,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22169 to 14758. [2021-06-05 13:49:01,920 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 13:49:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14758 states to 14758 states and 37380 transitions. [2021-06-05 13:49:01,945 INFO L78 Accepts]: Start accepts. Automaton has 14758 states and 37380 transitions. Word has length 59 [2021-06-05 13:49:01,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:01,945 INFO L482 AbstractCegarLoop]: Abstraction has 14758 states and 37380 transitions. [2021-06-05 13:49:01,945 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 13:49:01,945 INFO L276 IsEmpty]: Start isEmpty. Operand 14758 states and 37380 transitions. [2021-06-05 13:49:01,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:01,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:01,956 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 13:49:02,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1002 [2021-06-05 13:49:02,156 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:02,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:02,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1176258888, now seen corresponding path program 138 times [2021-06-05 13:49:02,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:02,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195748697] [2021-06-05 13:49:02,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:02,238 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 13:49:02,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:02,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195748697] [2021-06-05 13:49:02,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195748697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:02,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826556890] [2021-06-05 13:49:02,238 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 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 13:49:02,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 13:49:02,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:02,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:02,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:02,364 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 13:49:02,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826556890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:02,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:02,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:49:02,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138328157] [2021-06-05 13:49:02,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:49:02,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:02,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:49:02,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:49:02,365 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 13:49:02,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:02,740 INFO L93 Difference]: Finished difference Result 24727 states and 59450 transitions. [2021-06-05 13:49:02,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:49:02,740 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 13:49:02,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:02,770 INFO L225 Difference]: With dead ends: 24727 [2021-06-05 13:49:02,770 INFO L226 Difference]: Without dead ends: 24727 [2021-06-05 13:49:02,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:49:02,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24727 states. [2021-06-05 13:49:02,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24727 to 14806. [2021-06-05 13:49:03,004 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 13:49:03,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14806 states to 14806 states and 37523 transitions. [2021-06-05 13:49:03,126 INFO L78 Accepts]: Start accepts. Automaton has 14806 states and 37523 transitions. Word has length 59 [2021-06-05 13:49:03,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:03,126 INFO L482 AbstractCegarLoop]: Abstraction has 14806 states and 37523 transitions. [2021-06-05 13:49:03,126 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 13:49:03,126 INFO L276 IsEmpty]: Start isEmpty. Operand 14806 states and 37523 transitions. [2021-06-05 13:49:03,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:03,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:03,137 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 13:49:03,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1003,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:03,337 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:03,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:03,337 INFO L82 PathProgramCache]: Analyzing trace with hash -513736276, now seen corresponding path program 139 times [2021-06-05 13:49:03,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:03,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408505109] [2021-06-05 13:49:03,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:03,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:03,437 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 13:49:03,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:03,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408505109] [2021-06-05 13:49:03,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408505109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:03,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866533647] [2021-06-05 13:49:03,438 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 13:49:03,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:03,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:03,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:03,562 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 13:49:03,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866533647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:03,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:03,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 13:49:03,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928417289] [2021-06-05 13:49:03,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:49:03,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:03,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:49:03,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:49:03,562 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 13:49:04,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:04,071 INFO L93 Difference]: Finished difference Result 25465 states and 61218 transitions. [2021-06-05 13:49:04,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:49:04,071 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 13:49:04,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:04,102 INFO L225 Difference]: With dead ends: 25465 [2021-06-05 13:49:04,103 INFO L226 Difference]: Without dead ends: 25465 [2021-06-05 13:49:04,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 218.4ms TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:49:04,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25465 states. [2021-06-05 13:49:04,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25465 to 14863. [2021-06-05 13:49:04,337 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 13:49:04,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14863 states to 14863 states and 37693 transitions. [2021-06-05 13:49:04,360 INFO L78 Accepts]: Start accepts. Automaton has 14863 states and 37693 transitions. Word has length 59 [2021-06-05 13:49:04,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:04,360 INFO L482 AbstractCegarLoop]: Abstraction has 14863 states and 37693 transitions. [2021-06-05 13:49:04,360 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 13:49:04,360 INFO L276 IsEmpty]: Start isEmpty. Operand 14863 states and 37693 transitions. [2021-06-05 13:49:04,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:04,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:04,370 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 13:49:04,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1004 [2021-06-05 13:49:04,571 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:04,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:04,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1553023288, now seen corresponding path program 140 times [2021-06-05 13:49:04,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:04,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052846649] [2021-06-05 13:49:04,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:04,674 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 13:49:04,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:04,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052846649] [2021-06-05 13:49:04,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052846649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:04,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212055574] [2021-06-05 13:49:04,675 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 13:49:04,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:49:04,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:04,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:04,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:04,798 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 13:49:04,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212055574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:04,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:04,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 13:49:04,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409997126] [2021-06-05 13:49:04,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:49:04,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:04,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:49:04,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:49:04,799 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 13:49:05,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:05,289 INFO L93 Difference]: Finished difference Result 24352 states and 58685 transitions. [2021-06-05 13:49:05,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:49:05,289 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 13:49:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:05,317 INFO L225 Difference]: With dead ends: 24352 [2021-06-05 13:49:05,317 INFO L226 Difference]: Without dead ends: 24352 [2021-06-05 13:49:05,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=355, Invalid=575, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:49:05,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24352 states. [2021-06-05 13:49:05,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24352 to 14909. [2021-06-05 13:49:05,553 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 13:49:05,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14909 states to 14909 states and 37832 transitions. [2021-06-05 13:49:05,579 INFO L78 Accepts]: Start accepts. Automaton has 14909 states and 37832 transitions. Word has length 59 [2021-06-05 13:49:05,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:05,579 INFO L482 AbstractCegarLoop]: Abstraction has 14909 states and 37832 transitions. [2021-06-05 13:49:05,579 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 13:49:05,579 INFO L276 IsEmpty]: Start isEmpty. Operand 14909 states and 37832 transitions. [2021-06-05 13:49:05,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:05,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:05,589 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 13:49:05,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1005,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:05,790 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:05,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:05,790 INFO L82 PathProgramCache]: Analyzing trace with hash -533160916, now seen corresponding path program 141 times [2021-06-05 13:49:05,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:05,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799099048] [2021-06-05 13:49:05,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:05,906 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 13:49:05,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:05,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799099048] [2021-06-05 13:49:05,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799099048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:05,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442712145] [2021-06-05 13:49:05,906 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 13:49:05,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 13:49:05,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:05,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:49:05,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:06,102 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 13:49:06,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442712145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:06,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:06,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 21 [2021-06-05 13:49:06,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388301042] [2021-06-05 13:49:06,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:49:06,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:06,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:49:06,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:49:06,103 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 13:49:06,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:06,528 INFO L93 Difference]: Finished difference Result 17503 states and 42817 transitions. [2021-06-05 13:49:06,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:49:06,528 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 13:49:06,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:06,548 INFO L225 Difference]: With dead ends: 17503 [2021-06-05 13:49:06,548 INFO L226 Difference]: Without dead ends: 17503 [2021-06-05 13:49:06,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:49:06,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17503 states. [2021-06-05 13:49:06,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17503 to 14273. [2021-06-05 13:49:06,721 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 13:49:06,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 36110 transitions. [2021-06-05 13:49:06,743 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 36110 transitions. Word has length 59 [2021-06-05 13:49:06,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:06,743 INFO L482 AbstractCegarLoop]: Abstraction has 14273 states and 36110 transitions. [2021-06-05 13:49:06,743 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 13:49:06,743 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 36110 transitions. [2021-06-05 13:49:06,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:06,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:06,753 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 13:49:06,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1006 [2021-06-05 13:49:06,953 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:06,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:06,953 INFO L82 PathProgramCache]: Analyzing trace with hash -539355172, now seen corresponding path program 293 times [2021-06-05 13:49:06,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:06,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595014919] [2021-06-05 13:49:06,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:07,076 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 13:49:07,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:07,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595014919] [2021-06-05 13:49:07,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595014919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:07,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392206138] [2021-06-05 13:49:07,076 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 13:49:07,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 13:49:07,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:07,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:07,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:07,221 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 13:49:07,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392206138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:07,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:07,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 19 [2021-06-05 13:49:07,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863523346] [2021-06-05 13:49:07,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:49:07,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:07,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:49:07,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:49:07,222 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 13:49:07,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:07,629 INFO L93 Difference]: Finished difference Result 16871 states and 40798 transitions. [2021-06-05 13:49:07,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:49:07,630 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 13:49:07,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:07,650 INFO L225 Difference]: With dead ends: 16871 [2021-06-05 13:49:07,650 INFO L226 Difference]: Without dead ends: 16817 [2021-06-05 13:49:07,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=188, Invalid=514, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:49:07,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16817 states. [2021-06-05 13:49:07,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16817 to 14273. [2021-06-05 13:49:07,840 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 13:49:07,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 36095 transitions. [2021-06-05 13:49:07,863 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 36095 transitions. Word has length 59 [2021-06-05 13:49:07,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:07,863 INFO L482 AbstractCegarLoop]: Abstraction has 14273 states and 36095 transitions. [2021-06-05 13:49:07,863 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 13:49:07,864 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 36095 transitions. [2021-06-05 13:49:07,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:07,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:07,873 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 13:49:08,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1009,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:08,074 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:08,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:08,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1196579045, now seen corresponding path program 142 times [2021-06-05 13:49:08,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:08,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204534921] [2021-06-05 13:49:08,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:08,170 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 13:49:08,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:08,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204534921] [2021-06-05 13:49:08,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204534921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:08,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785174024] [2021-06-05 13:49:08,171 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 13:49:08,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:49:08,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:08,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:49:08,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:08,286 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 13:49:08,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785174024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:08,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:08,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:49:08,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257748588] [2021-06-05 13:49:08,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:49:08,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:08,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:49:08,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:49:08,287 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 13:49:08,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:08,875 INFO L93 Difference]: Finished difference Result 15978 states and 39441 transitions. [2021-06-05 13:49:08,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:49:08,875 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 13:49:08,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:08,892 INFO L225 Difference]: With dead ends: 15978 [2021-06-05 13:49:08,893 INFO L226 Difference]: Without dead ends: 15963 [2021-06-05 13:49:08,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:49:08,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15963 states. [2021-06-05 13:49:09,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15963 to 14540. [2021-06-05 13:49:09,057 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 13:49:09,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14540 states to 14540 states and 36724 transitions. [2021-06-05 13:49:09,078 INFO L78 Accepts]: Start accepts. Automaton has 14540 states and 36724 transitions. Word has length 59 [2021-06-05 13:49:09,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:09,078 INFO L482 AbstractCegarLoop]: Abstraction has 14540 states and 36724 transitions. [2021-06-05 13:49:09,078 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 13:49:09,078 INFO L276 IsEmpty]: Start isEmpty. Operand 14540 states and 36724 transitions. [2021-06-05 13:49:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:09,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:09,087 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 13:49:09,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1017 [2021-06-05 13:49:09,288 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:09,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:09,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1751753960, now seen corresponding path program 294 times [2021-06-05 13:49:09,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:09,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028633310] [2021-06-05 13:49:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:09,360 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 13:49:09,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:09,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028633310] [2021-06-05 13:49:09,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028633310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:09,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131135655] [2021-06-05 13:49:09,360 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 13:49:09,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 13:49:09,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:09,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:09,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:09,477 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 13:49:09,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131135655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:09,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:09,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:49:09,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37990221] [2021-06-05 13:49:09,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:49:09,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:09,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:49:09,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:49:09,477 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 13:49:09,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:09,681 INFO L93 Difference]: Finished difference Result 17442 states and 41946 transitions. [2021-06-05 13:49:09,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:49:09,681 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 13:49:09,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:09,703 INFO L225 Difference]: With dead ends: 17442 [2021-06-05 13:49:09,703 INFO L226 Difference]: Without dead ends: 17424 [2021-06-05 13:49:09,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:49:09,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17424 states. [2021-06-05 13:49:09,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17424 to 14540. [2021-06-05 13:49:09,899 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 13:49:09,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14540 states to 14540 states and 36706 transitions. [2021-06-05 13:49:09,920 INFO L78 Accepts]: Start accepts. Automaton has 14540 states and 36706 transitions. Word has length 59 [2021-06-05 13:49:09,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:09,920 INFO L482 AbstractCegarLoop]: Abstraction has 14540 states and 36706 transitions. [2021-06-05 13:49:09,920 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 13:49:09,921 INFO L276 IsEmpty]: Start isEmpty. Operand 14540 states and 36706 transitions. [2021-06-05 13:49:09,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:09,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:09,930 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 13:49:10,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1018,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:10,130 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:10,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:10,131 INFO L82 PathProgramCache]: Analyzing trace with hash 303753947, now seen corresponding path program 295 times [2021-06-05 13:49:10,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:10,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372758700] [2021-06-05 13:49:10,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:10,243 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 13:49:10,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:10,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372758700] [2021-06-05 13:49:10,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372758700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:10,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030396231] [2021-06-05 13:49:10,244 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 13:49:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:10,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:49:10,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:10,392 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 13:49:10,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030396231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:10,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:10,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 13:49:10,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781730249] [2021-06-05 13:49:10,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:49:10,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:10,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:49:10,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:49:10,393 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 13:49:11,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:11,176 INFO L93 Difference]: Finished difference Result 15609 states and 38572 transitions. [2021-06-05 13:49:11,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:49:11,176 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 13:49:11,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:11,193 INFO L225 Difference]: With dead ends: 15609 [2021-06-05 13:49:11,193 INFO L226 Difference]: Without dead ends: 15481 [2021-06-05 13:49:11,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:49:11,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15481 states. [2021-06-05 13:49:11,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15481 to 14586. [2021-06-05 13:49:11,372 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 13:49:11,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14586 states to 14586 states and 36688 transitions. [2021-06-05 13:49:11,395 INFO L78 Accepts]: Start accepts. Automaton has 14586 states and 36688 transitions. Word has length 59 [2021-06-05 13:49:11,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:11,395 INFO L482 AbstractCegarLoop]: Abstraction has 14586 states and 36688 transitions. [2021-06-05 13:49:11,395 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 13:49:11,395 INFO L276 IsEmpty]: Start isEmpty. Operand 14586 states and 36688 transitions. [2021-06-05 13:49:11,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:11,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:11,405 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 13:49:11,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1021,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:11,606 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:11,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:11,606 INFO L82 PathProgramCache]: Analyzing trace with hash -309782233, now seen corresponding path program 296 times [2021-06-05 13:49:11,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:11,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848363312] [2021-06-05 13:49:11,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:11,700 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 13:49:11,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:11,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848363312] [2021-06-05 13:49:11,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848363312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:11,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22557143] [2021-06-05 13:49:11,701 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 13:49:11,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:49:11,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:11,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:49:11,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:11,815 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 13:49:11,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22557143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:11,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:11,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:49:11,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812088432] [2021-06-05 13:49:11,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:49:11,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:11,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:49:11,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:49:11,816 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 13:49:12,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:12,411 INFO L93 Difference]: Finished difference Result 16298 states and 40065 transitions. [2021-06-05 13:49:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:49:12,411 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 13:49:12,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:12,428 INFO L225 Difference]: With dead ends: 16298 [2021-06-05 13:49:12,428 INFO L226 Difference]: Without dead ends: 16286 [2021-06-05 13:49:12,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:49:12,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16286 states. [2021-06-05 13:49:12,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16286 to 14730. [2021-06-05 13:49:12,606 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 13:49:12,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14730 states to 14730 states and 37054 transitions. [2021-06-05 13:49:12,630 INFO L78 Accepts]: Start accepts. Automaton has 14730 states and 37054 transitions. Word has length 59 [2021-06-05 13:49:12,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:12,630 INFO L482 AbstractCegarLoop]: Abstraction has 14730 states and 37054 transitions. [2021-06-05 13:49:12,630 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 13:49:12,630 INFO L276 IsEmpty]: Start isEmpty. Operand 14730 states and 37054 transitions. [2021-06-05 13:49:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:12,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:12,640 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 13:49:12,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-06-05 13:49:12,841 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:12,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:12,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1832135101, now seen corresponding path program 297 times [2021-06-05 13:49:12,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:12,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188521719] [2021-06-05 13:49:12,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:12,945 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 13:49:12,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:12,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188521719] [2021-06-05 13:49:12,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188521719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:12,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098077167] [2021-06-05 13:49:12,945 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 13:49:12,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 13:49:12,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:12,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:49:12,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:13,063 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 13:49:13,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098077167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:13,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:13,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:49:13,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815039421] [2021-06-05 13:49:13,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:49:13,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:13,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:49:13,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:49:13,064 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 13:49:13,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:13,873 INFO L93 Difference]: Finished difference Result 18459 states and 44889 transitions. [2021-06-05 13:49:13,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:49:13,874 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 13:49:13,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:13,894 INFO L225 Difference]: With dead ends: 18459 [2021-06-05 13:49:13,894 INFO L226 Difference]: Without dead ends: 18405 [2021-06-05 13:49:13,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 283.5ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:49:13,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18405 states. [2021-06-05 13:49:14,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18405 to 15161. [2021-06-05 13:49:14,089 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 13:49:14,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15161 states to 15161 states and 38226 transitions. [2021-06-05 13:49:14,115 INFO L78 Accepts]: Start accepts. Automaton has 15161 states and 38226 transitions. Word has length 59 [2021-06-05 13:49:14,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:14,115 INFO L482 AbstractCegarLoop]: Abstraction has 15161 states and 38226 transitions. [2021-06-05 13:49:14,115 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 13:49:14,115 INFO L276 IsEmpty]: Start isEmpty. Operand 15161 states and 38226 transitions. [2021-06-05 13:49:14,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:14,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:14,126 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 13:49:14,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1023 [2021-06-05 13:49:14,326 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:14,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:14,326 INFO L82 PathProgramCache]: Analyzing trace with hash -930273086, now seen corresponding path program 298 times [2021-06-05 13:49:14,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:14,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210839039] [2021-06-05 13:49:14,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:14,407 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 13:49:14,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:14,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210839039] [2021-06-05 13:49:14,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210839039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:14,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528238640] [2021-06-05 13:49:14,407 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 13:49:14,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:49:14,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:14,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:14,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:14,520 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 13:49:14,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528238640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:14,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:14,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:49:14,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788180915] [2021-06-05 13:49:14,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:49:14,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:14,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:49:14,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:49:14,520 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 13:49:14,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:14,793 INFO L93 Difference]: Finished difference Result 18207 states and 43712 transitions. [2021-06-05 13:49:14,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:49:14,793 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 13:49:14,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:14,821 INFO L225 Difference]: With dead ends: 18207 [2021-06-05 13:49:14,821 INFO L226 Difference]: Without dead ends: 18183 [2021-06-05 13:49:14,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:49:14,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18183 states. [2021-06-05 13:49:15,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18183 to 15161. [2021-06-05 13:49:15,036 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 13:49:15,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15161 states to 15161 states and 38212 transitions. [2021-06-05 13:49:15,058 INFO L78 Accepts]: Start accepts. Automaton has 15161 states and 38212 transitions. Word has length 59 [2021-06-05 13:49:15,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:15,059 INFO L482 AbstractCegarLoop]: Abstraction has 15161 states and 38212 transitions. [2021-06-05 13:49:15,059 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 13:49:15,059 INFO L276 IsEmpty]: Start isEmpty. Operand 15161 states and 38212 transitions. [2021-06-05 13:49:15,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:15,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:15,068 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 13:49:15,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1024,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:15,269 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:15,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:15,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1986971635, now seen corresponding path program 299 times [2021-06-05 13:49:15,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:15,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660710722] [2021-06-05 13:49:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:15,374 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 13:49:15,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:15,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660710722] [2021-06-05 13:49:15,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660710722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:15,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309086152] [2021-06-05 13:49:15,375 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 13:49:15,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 13:49:15,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:15,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:49:15,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:15,495 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 13:49:15,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309086152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:15,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:15,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:49:15,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645777899] [2021-06-05 13:49:15,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:49:15,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:15,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:49:15,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:49:15,496 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 13:49:16,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:16,806 INFO L93 Difference]: Finished difference Result 23302 states and 55848 transitions. [2021-06-05 13:49:16,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 13:49:16,806 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 13:49:16,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:16,828 INFO L225 Difference]: With dead ends: 23302 [2021-06-05 13:49:16,828 INFO L226 Difference]: Without dead ends: 23134 [2021-06-05 13:49:16,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 557.2ms TimeCoverageRelationStatistics Valid=327, Invalid=2865, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 13:49:16,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23134 states. [2021-06-05 13:49:17,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23134 to 16060. [2021-06-05 13:49:17,044 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 13:49:17,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16060 states to 16060 states and 40577 transitions. [2021-06-05 13:49:17,069 INFO L78 Accepts]: Start accepts. Automaton has 16060 states and 40577 transitions. Word has length 59 [2021-06-05 13:49:17,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:17,069 INFO L482 AbstractCegarLoop]: Abstraction has 16060 states and 40577 transitions. [2021-06-05 13:49:17,069 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 13:49:17,069 INFO L276 IsEmpty]: Start isEmpty. Operand 16060 states and 40577 transitions. [2021-06-05 13:49:17,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:17,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:17,079 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 13:49:17,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1028 [2021-06-05 13:49:17,280 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:17,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:17,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1921392984, now seen corresponding path program 300 times [2021-06-05 13:49:17,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:17,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380092354] [2021-06-05 13:49:17,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:17,372 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 13:49:17,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:17,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380092354] [2021-06-05 13:49:17,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380092354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:17,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498498217] [2021-06-05 13:49:17,372 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 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 13:49:17,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 13:49:17,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:17,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:17,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:17,491 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 13:49:17,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498498217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:17,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:17,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 13:49:17,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424740694] [2021-06-05 13:49:17,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:49:17,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:17,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:49:17,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:49:17,492 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 13:49:17,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:17,719 INFO L93 Difference]: Finished difference Result 19290 states and 46411 transitions. [2021-06-05 13:49:17,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:49:17,719 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 13:49:17,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:17,741 INFO L225 Difference]: With dead ends: 19290 [2021-06-05 13:49:17,741 INFO L226 Difference]: Without dead ends: 19257 [2021-06-05 13:49:17,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:49:17,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19257 states. [2021-06-05 13:49:17,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19257 to 16060. [2021-06-05 13:49:17,957 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 13:49:17,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16060 states to 16060 states and 40568 transitions. [2021-06-05 13:49:17,982 INFO L78 Accepts]: Start accepts. Automaton has 16060 states and 40568 transitions. Word has length 59 [2021-06-05 13:49:17,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:17,982 INFO L482 AbstractCegarLoop]: Abstraction has 16060 states and 40568 transitions. [2021-06-05 13:49:17,982 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 13:49:17,982 INFO L276 IsEmpty]: Start isEmpty. Operand 16060 states and 40568 transitions. [2021-06-05 13:49:17,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:17,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:17,992 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 13:49:18,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1029,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:18,192 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:18,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:18,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1927280125, now seen corresponding path program 301 times [2021-06-05 13:49:18,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:18,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269430951] [2021-06-05 13:49:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:18,324 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 13:49:18,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:18,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269430951] [2021-06-05 13:49:18,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269430951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:18,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796464343] [2021-06-05 13:49:18,324 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 13:49:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:18,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:49:18,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:18,454 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 13:49:18,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796464343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:18,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:18,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:49:18,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172580285] [2021-06-05 13:49:18,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:49:18,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:18,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:49:18,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:49:18,455 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 13:49:20,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:20,534 INFO L93 Difference]: Finished difference Result 33633 states and 79425 transitions. [2021-06-05 13:49:20,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 13:49:20,535 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 13:49:20,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:20,580 INFO L225 Difference]: With dead ends: 33633 [2021-06-05 13:49:20,580 INFO L226 Difference]: Without dead ends: 33177 [2021-06-05 13:49:20,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3400 ImplicationChecksByTransitivity, 1173.6ms TimeCoverageRelationStatistics Valid=813, Invalid=8499, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 13:49:20,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33177 states. [2021-06-05 13:49:20,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33177 to 17660. [2021-06-05 13:49:20,897 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 13:49:20,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17660 states to 17660 states and 44722 transitions. [2021-06-05 13:49:20,925 INFO L78 Accepts]: Start accepts. Automaton has 17660 states and 44722 transitions. Word has length 59 [2021-06-05 13:49:20,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:20,925 INFO L482 AbstractCegarLoop]: Abstraction has 17660 states and 44722 transitions. [2021-06-05 13:49:20,925 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 13:49:20,925 INFO L276 IsEmpty]: Start isEmpty. Operand 17660 states and 44722 transitions. [2021-06-05 13:49:20,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:20,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:20,935 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 13:49:21,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1034 [2021-06-05 13:49:21,136 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:21,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:21,136 INFO L82 PathProgramCache]: Analyzing trace with hash -474114302, now seen corresponding path program 302 times [2021-06-05 13:49:21,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:21,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863735652] [2021-06-05 13:49:21,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:21,319 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 13:49:21,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:21,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863735652] [2021-06-05 13:49:21,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863735652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:21,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526663248] [2021-06-05 13:49:21,320 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 13:49:21,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:49:21,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:21,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:21,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:21,436 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 13:49:21,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526663248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:21,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:21,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 13:49:21,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699066456] [2021-06-05 13:49:21,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:49:21,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:21,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:49:21,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:49:21,436 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 13:49:21,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:21,708 INFO L93 Difference]: Finished difference Result 21199 states and 51145 transitions. [2021-06-05 13:49:21,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:49:21,708 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 13:49:21,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:21,731 INFO L225 Difference]: With dead ends: 21199 [2021-06-05 13:49:21,731 INFO L226 Difference]: Without dead ends: 21157 [2021-06-05 13:49:21,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:49:21,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21157 states. [2021-06-05 13:49:21,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21157 to 17660. [2021-06-05 13:49:21,957 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 13:49:21,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17660 states to 17660 states and 44713 transitions. [2021-06-05 13:49:21,987 INFO L78 Accepts]: Start accepts. Automaton has 17660 states and 44713 transitions. Word has length 59 [2021-06-05 13:49:21,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:21,988 INFO L482 AbstractCegarLoop]: Abstraction has 17660 states and 44713 transitions. [2021-06-05 13:49:21,988 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 13:49:21,988 INFO L276 IsEmpty]: Start isEmpty. Operand 17660 states and 44713 transitions. [2021-06-05 13:49:21,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:21,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:21,999 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 13:49:22,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-06-05 13:49:22,199 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:22,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:22,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1773966259, now seen corresponding path program 303 times [2021-06-05 13:49:22,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:22,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569316228] [2021-06-05 13:49:22,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:22,326 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 13:49:22,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:22,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569316228] [2021-06-05 13:49:22,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569316228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:22,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873832089] [2021-06-05 13:49:22,326 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 13:49:22,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 13:49:22,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:22,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:49:22,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:22,445 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 13:49:22,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873832089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:22,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:22,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:49:22,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380184047] [2021-06-05 13:49:22,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:49:22,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:22,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:49:22,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:49:22,446 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 13:49:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:25,736 INFO L93 Difference]: Finished difference Result 57125 states and 132657 transitions. [2021-06-05 13:49:25,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-06-05 13:49:25,737 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 13:49:25,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:25,816 INFO L225 Difference]: With dead ends: 57125 [2021-06-05 13:49:25,816 INFO L226 Difference]: Without dead ends: 55739 [2021-06-05 13:49:25,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10598 ImplicationChecksByTransitivity, 2243.0ms TimeCoverageRelationStatistics Valid=1947, Invalid=23813, Unknown=0, NotChecked=0, Total=25760 [2021-06-05 13:49:25,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55739 states. [2021-06-05 13:49:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55739 to 20191. [2021-06-05 13:49:26,381 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 13:49:26,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20191 states to 20191 states and 51242 transitions. [2021-06-05 13:49:26,416 INFO L78 Accepts]: Start accepts. Automaton has 20191 states and 51242 transitions. Word has length 59 [2021-06-05 13:49:26,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:26,416 INFO L482 AbstractCegarLoop]: Abstraction has 20191 states and 51242 transitions. [2021-06-05 13:49:26,416 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 13:49:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand 20191 states and 51242 transitions. [2021-06-05 13:49:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:26,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:26,429 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 13:49:26,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1041,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:26,630 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:26,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:26,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1771583384, now seen corresponding path program 304 times [2021-06-05 13:49:26,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:26,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007643399] [2021-06-05 13:49:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:26,746 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 13:49:26,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:26,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007643399] [2021-06-05 13:49:26,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007643399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:26,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680070037] [2021-06-05 13:49:26,747 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 13:49:26,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:49:26,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:26,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:26,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:26,873 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 13:49:26,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680070037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:26,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:26,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 13:49:26,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676734200] [2021-06-05 13:49:26,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:49:26,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:26,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:49:26,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:49:26,874 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 13:49:27,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:27,232 INFO L93 Difference]: Finished difference Result 24224 states and 58607 transitions. [2021-06-05 13:49:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:49:27,232 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 13:49:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:27,264 INFO L225 Difference]: With dead ends: 24224 [2021-06-05 13:49:27,264 INFO L226 Difference]: Without dead ends: 24173 [2021-06-05 13:49:27,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:49:27,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24173 states. [2021-06-05 13:49:27,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24173 to 20191. [2021-06-05 13:49:27,561 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 13:49:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20191 states to 20191 states and 51233 transitions. [2021-06-05 13:49:27,595 INFO L78 Accepts]: Start accepts. Automaton has 20191 states and 51233 transitions. Word has length 59 [2021-06-05 13:49:27,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:27,595 INFO L482 AbstractCegarLoop]: Abstraction has 20191 states and 51233 transitions. [2021-06-05 13:49:27,595 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 13:49:27,595 INFO L276 IsEmpty]: Start isEmpty. Operand 20191 states and 51233 transitions. [2021-06-05 13:49:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:27,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:27,606 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 13:49:27,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,497 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:27,807 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:27,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:27,807 INFO L82 PathProgramCache]: Analyzing trace with hash -49180099, now seen corresponding path program 305 times [2021-06-05 13:49:27,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:27,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105579149] [2021-06-05 13:49:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:27,951 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 13:49:27,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:27,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105579149] [2021-06-05 13:49:27,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105579149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:27,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476473868] [2021-06-05 13:49:27,952 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 13:49:27,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 13:49:27,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:27,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:49:27,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:28,071 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 13:49:28,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476473868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:28,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:28,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 13:49:28,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099867271] [2021-06-05 13:49:28,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:49:28,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:28,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:49:28,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:49:28,072 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 13:49:33,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:33,438 INFO L93 Difference]: Finished difference Result 72936 states and 170877 transitions. [2021-06-05 13:49:33,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-06-05 13:49:33,438 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 13:49:33,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:33,536 INFO L225 Difference]: With dead ends: 72936 [2021-06-05 13:49:33,536 INFO L226 Difference]: Without dead ends: 71616 [2021-06-05 13:49:33,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29073 ImplicationChecksByTransitivity, 4210.2ms TimeCoverageRelationStatistics Valid=4377, Invalid=61415, Unknown=0, NotChecked=0, Total=65792 [2021-06-05 13:49:33,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71616 states. [2021-06-05 13:49:34,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71616 to 22239. [2021-06-05 13:49:34,103 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 13:49:34,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22239 states to 22239 states and 56457 transitions. [2021-06-05 13:49:34,139 INFO L78 Accepts]: Start accepts. Automaton has 22239 states and 56457 transitions. Word has length 59 [2021-06-05 13:49:34,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:34,139 INFO L482 AbstractCegarLoop]: Abstraction has 22239 states and 56457 transitions. [2021-06-05 13:49:34,139 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 13:49:34,139 INFO L276 IsEmpty]: Start isEmpty. Operand 22239 states and 56457 transitions. [2021-06-05 13:49:34,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:34,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:34,150 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 13:49:34,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1049,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:34,350 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:34,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:34,351 INFO L82 PathProgramCache]: Analyzing trace with hash 32658754, now seen corresponding path program 306 times [2021-06-05 13:49:34,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:34,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106617393] [2021-06-05 13:49:34,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:34,498 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 13:49:34,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:34,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106617393] [2021-06-05 13:49:34,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106617393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:34,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234342440] [2021-06-05 13:49:34,498 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 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 13:49:34,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 13:49:34,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:34,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:34,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:34,643 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 13:49:34,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234342440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:34,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:34,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 13:49:34,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374920679] [2021-06-05 13:49:34,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:49:34,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:34,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:49:34,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:49:34,644 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 13:49:34,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:34,987 INFO L93 Difference]: Finished difference Result 26451 states and 64189 transitions. [2021-06-05 13:49:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:49:34,987 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 13:49:34,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:35,022 INFO L225 Difference]: With dead ends: 26451 [2021-06-05 13:49:35,022 INFO L226 Difference]: Without dead ends: 26391 [2021-06-05 13:49:35,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:49:35,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26391 states. [2021-06-05 13:49:35,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26391 to 21958. [2021-06-05 13:49:35,377 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 13:49:35,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21958 states to 21958 states and 55705 transitions. [2021-06-05 13:49:35,416 INFO L78 Accepts]: Start accepts. Automaton has 21958 states and 55705 transitions. Word has length 59 [2021-06-05 13:49:35,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:35,417 INFO L482 AbstractCegarLoop]: Abstraction has 21958 states and 55705 transitions. [2021-06-05 13:49:35,417 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 13:49:35,417 INFO L276 IsEmpty]: Start isEmpty. Operand 21958 states and 55705 transitions. [2021-06-05 13:49:35,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:35,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:35,429 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 13:49:35,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1050,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:35,629 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:35,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:35,630 INFO L82 PathProgramCache]: Analyzing trace with hash 754093939, now seen corresponding path program 307 times [2021-06-05 13:49:35,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:35,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502508990] [2021-06-05 13:49:35,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:35,786 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 13:49:35,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:35,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502508990] [2021-06-05 13:49:35,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502508990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:35,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280116233] [2021-06-05 13:49:35,786 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 13:49:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:35,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:49:35,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:35,901 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 13:49:35,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280116233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:35,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:35,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 13:49:35,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611405150] [2021-06-05 13:49:35,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:49:35,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:35,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:49:35,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:49:35,902 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 13:49:36,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:36,883 INFO L93 Difference]: Finished difference Result 30778 states and 73104 transitions. [2021-06-05 13:49:36,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:49:36,884 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 13:49:36,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:36,922 INFO L225 Difference]: With dead ends: 30778 [2021-06-05 13:49:36,923 INFO L226 Difference]: Without dead ends: 28996 [2021-06-05 13:49:36,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 438.1ms TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:49:36,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28996 states. [2021-06-05 13:49:37,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28996 to 14128. [2021-06-05 13:49:37,175 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 13:49:37,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14128 states to 14128 states and 35351 transitions. [2021-06-05 13:49:37,199 INFO L78 Accepts]: Start accepts. Automaton has 14128 states and 35351 transitions. Word has length 59 [2021-06-05 13:49:37,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:37,199 INFO L482 AbstractCegarLoop]: Abstraction has 14128 states and 35351 transitions. [2021-06-05 13:49:37,199 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 13:49:37,199 INFO L276 IsEmpty]: Start isEmpty. Operand 14128 states and 35351 transitions. [2021-06-05 13:49:37,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:37,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:37,209 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 13:49:37,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1058 [2021-06-05 13:49:37,410 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:37,410 INFO L82 PathProgramCache]: Analyzing trace with hash 516032422, now seen corresponding path program 143 times [2021-06-05 13:49:37,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:37,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565115550] [2021-06-05 13:49:37,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:37,484 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 13:49:37,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:37,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565115550] [2021-06-05 13:49:37,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565115550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:37,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641908312] [2021-06-05 13:49:37,484 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 13:49:37,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 13:49:37,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:37,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:37,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:37,673 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 13:49:37,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641908312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:37,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:37,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 20 [2021-06-05 13:49:37,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999601713] [2021-06-05 13:49:37,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:49:37,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:37,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:49:37,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:49:37,677 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 13:49:38,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:38,045 INFO L93 Difference]: Finished difference Result 16812 states and 41038 transitions. [2021-06-05 13:49:38,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:49:38,045 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 13:49:38,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:38,065 INFO L225 Difference]: With dead ends: 16812 [2021-06-05 13:49:38,065 INFO L226 Difference]: Without dead ends: 16798 [2021-06-05 13:49:38,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:38,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16798 states. [2021-06-05 13:49:38,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16798 to 14566. [2021-06-05 13:49:38,260 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 13:49:38,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14566 states to 14566 states and 36487 transitions. [2021-06-05 13:49:38,284 INFO L78 Accepts]: Start accepts. Automaton has 14566 states and 36487 transitions. Word has length 59 [2021-06-05 13:49:38,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:38,284 INFO L482 AbstractCegarLoop]: Abstraction has 14566 states and 36487 transitions. [2021-06-05 13:49:38,284 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 13:49:38,284 INFO L276 IsEmpty]: Start isEmpty. Operand 14566 states and 36487 transitions. [2021-06-05 13:49:38,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:38,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:38,294 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 13:49:38,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1059 [2021-06-05 13:49:38,495 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:38,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:38,495 INFO L82 PathProgramCache]: Analyzing trace with hash -105847988, now seen corresponding path program 144 times [2021-06-05 13:49:38,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:38,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607032108] [2021-06-05 13:49:38,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:38,568 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 13:49:38,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:38,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607032108] [2021-06-05 13:49:38,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607032108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:38,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105681141] [2021-06-05 13:49:38,568 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 13:49:38,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 13:49:38,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:38,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:38,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:38,692 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 13:49:38,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105681141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:38,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:38,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 13:49:38,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559036244] [2021-06-05 13:49:38,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:49:38,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:38,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:49:38,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:49:38,693 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 13:49:39,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:39,006 INFO L93 Difference]: Finished difference Result 19427 states and 46843 transitions. [2021-06-05 13:49:39,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:49:39,006 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 13:49:39,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:39,030 INFO L225 Difference]: With dead ends: 19427 [2021-06-05 13:49:39,030 INFO L226 Difference]: Without dead ends: 19427 [2021-06-05 13:49:39,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:49:39,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19427 states. [2021-06-05 13:49:39,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19427 to 14571. [2021-06-05 13:49:39,283 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 13:49:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14571 states to 14571 states and 36502 transitions. [2021-06-05 13:49:39,305 INFO L78 Accepts]: Start accepts. Automaton has 14571 states and 36502 transitions. Word has length 59 [2021-06-05 13:49:39,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:39,305 INFO L482 AbstractCegarLoop]: Abstraction has 14571 states and 36502 transitions. [2021-06-05 13:49:39,305 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 13:49:39,305 INFO L276 IsEmpty]: Start isEmpty. Operand 14571 states and 36502 transitions. [2021-06-05 13:49:39,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:39,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:39,315 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 13:49:39,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1061 [2021-06-05 13:49:39,515 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:39,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:39,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1743420444, now seen corresponding path program 145 times [2021-06-05 13:49:39,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:39,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647515495] [2021-06-05 13:49:39,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:39,605 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 13:49:39,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:39,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647515495] [2021-06-05 13:49:39,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647515495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:39,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850742201] [2021-06-05 13:49:39,605 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 13:49:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:39,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:39,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:39,729 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 13:49:39,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850742201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:39,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:39,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:49:39,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824115123] [2021-06-05 13:49:39,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:49:39,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:39,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:49:39,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:49:39,730 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 13:49:40,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:40,173 INFO L93 Difference]: Finished difference Result 21523 states and 51587 transitions. [2021-06-05 13:49:40,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:49:40,174 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 13:49:40,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:40,198 INFO L225 Difference]: With dead ends: 21523 [2021-06-05 13:49:40,198 INFO L226 Difference]: Without dead ends: 21523 [2021-06-05 13:49:40,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=272, Invalid=430, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:49:40,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21523 states. [2021-06-05 13:49:40,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21523 to 14590. [2021-06-05 13:49:40,401 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 13:49:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14590 states to 14590 states and 36562 transitions. [2021-06-05 13:49:40,422 INFO L78 Accepts]: Start accepts. Automaton has 14590 states and 36562 transitions. Word has length 59 [2021-06-05 13:49:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:40,423 INFO L482 AbstractCegarLoop]: Abstraction has 14590 states and 36562 transitions. [2021-06-05 13:49:40,423 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 13:49:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 14590 states and 36562 transitions. [2021-06-05 13:49:40,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:40,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:40,432 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 13:49:40,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:40,632 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:40,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:40,633 INFO L82 PathProgramCache]: Analyzing trace with hash 861551688, now seen corresponding path program 146 times [2021-06-05 13:49:40,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:40,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523592078] [2021-06-05 13:49:40,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:40,732 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 13:49:40,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:40,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523592078] [2021-06-05 13:49:40,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523592078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:40,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642271717] [2021-06-05 13:49:40,732 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 13:49:40,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:49:40,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:40,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:40,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:40,856 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 13:49:40,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642271717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:40,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:40,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 13:49:40,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564171865] [2021-06-05 13:49:40,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:49:40,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:40,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:49:40,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:49:40,857 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 13:49:41,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:41,366 INFO L93 Difference]: Finished difference Result 22499 states and 53828 transitions. [2021-06-05 13:49:41,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:49:41,366 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 13:49:41,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:41,393 INFO L225 Difference]: With dead ends: 22499 [2021-06-05 13:49:41,393 INFO L226 Difference]: Without dead ends: 22499 [2021-06-05 13:49:41,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 251.4ms TimeCoverageRelationStatistics Valid=375, Invalid=617, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:49:41,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22499 states. [2021-06-05 13:49:41,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22499 to 14615. [2021-06-05 13:49:41,604 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 13:49:41,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14615 states to 14615 states and 36640 transitions. [2021-06-05 13:49:41,626 INFO L78 Accepts]: Start accepts. Automaton has 14615 states and 36640 transitions. Word has length 59 [2021-06-05 13:49:41,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:41,626 INFO L482 AbstractCegarLoop]: Abstraction has 14615 states and 36640 transitions. [2021-06-05 13:49:41,626 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 13:49:41,626 INFO L276 IsEmpty]: Start isEmpty. Operand 14615 states and 36640 transitions. [2021-06-05 13:49:41,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:41,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:41,636 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 13:49:41,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:41,837 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:41,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:41,837 INFO L82 PathProgramCache]: Analyzing trace with hash -177735324, now seen corresponding path program 147 times [2021-06-05 13:49:41,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:41,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332484864] [2021-06-05 13:49:41,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:41,941 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 13:49:41,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:41,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332484864] [2021-06-05 13:49:41,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332484864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:41,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112679548] [2021-06-05 13:49:41,942 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 13:49:41,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 13:49:41,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:41,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:41,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:42,068 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 13:49:42,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112679548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:42,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:42,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 13:49:42,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969494317] [2021-06-05 13:49:42,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:49:42,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:42,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:49:42,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:49:42,069 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 13:49:42,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:42,722 INFO L93 Difference]: Finished difference Result 22401 states and 53647 transitions. [2021-06-05 13:49:42,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:49:42,723 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 13:49:42,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:42,751 INFO L225 Difference]: With dead ends: 22401 [2021-06-05 13:49:42,751 INFO L226 Difference]: Without dead ends: 22401 [2021-06-05 13:49:42,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 286.8ms TimeCoverageRelationStatistics Valid=448, Invalid=742, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:49:42,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22401 states. [2021-06-05 13:49:42,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22401 to 14646. [2021-06-05 13:49:42,980 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 13:49:43,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14646 states to 14646 states and 36736 transitions. [2021-06-05 13:49:43,003 INFO L78 Accepts]: Start accepts. Automaton has 14646 states and 36736 transitions. Word has length 59 [2021-06-05 13:49:43,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:43,003 INFO L482 AbstractCegarLoop]: Abstraction has 14646 states and 36736 transitions. [2021-06-05 13:49:43,003 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 13:49:43,003 INFO L276 IsEmpty]: Start isEmpty. Operand 14646 states and 36736 transitions. [2021-06-05 13:49:43,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:43,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:43,012 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 13:49:43,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,505 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:43,213 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:43,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:43,213 INFO L82 PathProgramCache]: Analyzing trace with hash 842127048, now seen corresponding path program 148 times [2021-06-05 13:49:43,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:43,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158612104] [2021-06-05 13:49:43,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:43,329 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 13:49:43,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:43,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158612104] [2021-06-05 13:49:43,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158612104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:43,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037529827] [2021-06-05 13:49:43,330 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 13:49:43,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:49:43,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:43,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:43,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:43,453 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 13:49:43,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037529827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:43,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:43,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 13:49:43,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545051841] [2021-06-05 13:49:43,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:49:43,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:43,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:49:43,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:49:43,454 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 13:49:44,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:44,108 INFO L93 Difference]: Finished difference Result 21283 states and 51152 transitions. [2021-06-05 13:49:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:49:44,109 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 13:49:44,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:44,135 INFO L225 Difference]: With dead ends: 21283 [2021-06-05 13:49:44,136 INFO L226 Difference]: Without dead ends: 21283 [2021-06-05 13:49:44,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 309.0ms TimeCoverageRelationStatistics Valid=473, Invalid=787, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:49:44,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21283 states. [2021-06-05 13:49:44,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21283 to 14683. [2021-06-05 13:49:44,351 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 13:49:44,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14683 states to 14683 states and 36850 transitions. [2021-06-05 13:49:44,374 INFO L78 Accepts]: Start accepts. Automaton has 14683 states and 36850 transitions. Word has length 59 [2021-06-05 13:49:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:44,374 INFO L482 AbstractCegarLoop]: Abstraction has 14683 states and 36850 transitions. [2021-06-05 13:49:44,374 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 13:49:44,374 INFO L276 IsEmpty]: Start isEmpty. Operand 14683 states and 36850 transitions. [2021-06-05 13:49:44,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:44,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:44,383 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 13:49:44,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:44,584 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:44,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:44,584 INFO L82 PathProgramCache]: Analyzing trace with hash 963399396, now seen corresponding path program 149 times [2021-06-05 13:49:44,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:44,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329037782] [2021-06-05 13:49:44,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:44,718 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 13:49:44,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:44,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329037782] [2021-06-05 13:49:44,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329037782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:44,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258607446] [2021-06-05 13:49:44,719 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 13:49:44,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 13:49:44,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:44,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:44,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:44,913 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 13:49:44,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258607446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:44,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:44,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 13:49:44,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013664037] [2021-06-05 13:49:44,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:49:44,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:44,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:49:44,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:49:44,914 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 13:49:45,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:45,660 INFO L93 Difference]: Finished difference Result 19401 states and 46815 transitions. [2021-06-05 13:49:45,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:49:45,660 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 13:49:45,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:45,681 INFO L225 Difference]: With dead ends: 19401 [2021-06-05 13:49:45,682 INFO L226 Difference]: Without dead ends: 19401 [2021-06-05 13:49:45,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 382.7ms TimeCoverageRelationStatistics Valid=617, Invalid=1189, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 13:49:45,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19401 states. [2021-06-05 13:49:45,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19401 to 14710. [2021-06-05 13:49:45,897 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 13:49:45,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14710 states to 14710 states and 36928 transitions. [2021-06-05 13:49:45,922 INFO L78 Accepts]: Start accepts. Automaton has 14710 states and 36928 transitions. Word has length 59 [2021-06-05 13:49:45,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:45,922 INFO L482 AbstractCegarLoop]: Abstraction has 14710 states and 36928 transitions. [2021-06-05 13:49:45,922 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 13:49:45,922 INFO L276 IsEmpty]: Start isEmpty. Operand 14710 states and 36928 transitions. [2021-06-05 13:49:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:45,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:45,933 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 13:49:46,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1066 [2021-06-05 13:49:46,133 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:46,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:46,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1720422728, now seen corresponding path program 150 times [2021-06-05 13:49:46,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:46,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489765150] [2021-06-05 13:49:46,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:46,283 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 13:49:46,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:46,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489765150] [2021-06-05 13:49:46,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489765150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:46,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4048402] [2021-06-05 13:49:46,284 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 13:49:46,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 13:49:46,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:46,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:46,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:46,413 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 13:49:46,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4048402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:46,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:46,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 18 [2021-06-05 13:49:46,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362476357] [2021-06-05 13:49:46,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:49:46,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:46,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:49:46,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:49:46,414 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 13:49:46,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:46,919 INFO L93 Difference]: Finished difference Result 16916 states and 41381 transitions. [2021-06-05 13:49:46,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:49:46,920 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 13:49:46,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:46,942 INFO L225 Difference]: With dead ends: 16916 [2021-06-05 13:49:46,942 INFO L226 Difference]: Without dead ends: 16916 [2021-06-05 13:49:46,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 287.9ms TimeCoverageRelationStatistics Valid=347, Invalid=645, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:49:46,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16916 states. [2021-06-05 13:49:47,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16916 to 13840. [2021-06-05 13:49:47,143 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 13:49:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13840 states to 13840 states and 34624 transitions. [2021-06-05 13:49:47,167 INFO L78 Accepts]: Start accepts. Automaton has 13840 states and 34624 transitions. Word has length 59 [2021-06-05 13:49:47,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:47,167 INFO L482 AbstractCegarLoop]: Abstraction has 13840 states and 34624 transitions. [2021-06-05 13:49:47,167 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 13:49:47,167 INFO L276 IsEmpty]: Start isEmpty. Operand 13840 states and 34624 transitions. [2021-06-05 13:49:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:47,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:47,177 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 13:49:47,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1067,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:47,377 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:47,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:47,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1305517528, now seen corresponding path program 308 times [2021-06-05 13:49:47,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:47,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677885178] [2021-06-05 13:49:47,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:47,518 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 13:49:47,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:47,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677885178] [2021-06-05 13:49:47,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677885178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:47,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930741700] [2021-06-05 13:49:47,518 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 13:49:47,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:49:47,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:47,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:47,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:47,637 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 13:49:47,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930741700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:47,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:47,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 13:49:47,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929584367] [2021-06-05 13:49:47,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:49:47,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:47,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:49:47,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:49:47,638 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 13:49:47,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:47,975 INFO L93 Difference]: Finished difference Result 16377 states and 39177 transitions. [2021-06-05 13:49:47,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:49:47,975 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 13:49:47,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:47,990 INFO L225 Difference]: With dead ends: 16377 [2021-06-05 13:49:47,990 INFO L226 Difference]: Without dead ends: 16314 [2021-06-05 13:49:47,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:49:48,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16314 states. [2021-06-05 13:49:48,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16314 to 13849. [2021-06-05 13:49:48,208 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 13:49:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13849 states to 13849 states and 34633 transitions. [2021-06-05 13:49:48,229 INFO L78 Accepts]: Start accepts. Automaton has 13849 states and 34633 transitions. Word has length 59 [2021-06-05 13:49:48,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:48,229 INFO L482 AbstractCegarLoop]: Abstraction has 13849 states and 34633 transitions. [2021-06-05 13:49:48,229 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 13:49:48,229 INFO L276 IsEmpty]: Start isEmpty. Operand 13849 states and 34633 transitions. [2021-06-05 13:49:48,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:48,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:48,238 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 13:49:48,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1068 [2021-06-05 13:49:48,439 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:48,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:48,439 INFO L82 PathProgramCache]: Analyzing trace with hash -290755390, now seen corresponding path program 309 times [2021-06-05 13:49:48,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:48,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604913212] [2021-06-05 13:49:48,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:48,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:48,599 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 13:49:48,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:48,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604913212] [2021-06-05 13:49:48,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604913212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:48,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199340618] [2021-06-05 13:49:48,600 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 13:49:48,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 13:49:48,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:48,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:48,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:48,724 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 13:49:48,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199340618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:48,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:48,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 13:49:48,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004612858] [2021-06-05 13:49:48,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:49:48,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:48,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:49:48,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:49:48,725 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 13:49:49,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:49,217 INFO L93 Difference]: Finished difference Result 16221 states and 39411 transitions. [2021-06-05 13:49:49,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:49:49,217 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 13:49:49,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:49,238 INFO L225 Difference]: With dead ends: 16221 [2021-06-05 13:49:49,238 INFO L226 Difference]: Without dead ends: 16221 [2021-06-05 13:49:49,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 288.6ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:49:49,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16221 states. [2021-06-05 13:49:49,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16221 to 13663. [2021-06-05 13:49:49,421 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 13:49:49,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13663 states to 13663 states and 34243 transitions. [2021-06-05 13:49:49,442 INFO L78 Accepts]: Start accepts. Automaton has 13663 states and 34243 transitions. Word has length 59 [2021-06-05 13:49:49,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:49,442 INFO L482 AbstractCegarLoop]: Abstraction has 13663 states and 34243 transitions. [2021-06-05 13:49:49,443 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 13:49:49,443 INFO L276 IsEmpty]: Start isEmpty. Operand 13663 states and 34243 transitions. [2021-06-05 13:49:49,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:49,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:49,452 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 13:49:49,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1077 [2021-06-05 13:49:49,652 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:49,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:49,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1740888523, now seen corresponding path program 151 times [2021-06-05 13:49:49,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:49,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802546785] [2021-06-05 13:49:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:49,805 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 13:49:49,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:49,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802546785] [2021-06-05 13:49:49,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802546785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:49,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816521391] [2021-06-05 13:49:49,806 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 13:49:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:49,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:49:49,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:49,917 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 13:49:49,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816521391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:49,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:49,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 13:49:49,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432038341] [2021-06-05 13:49:49,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:49:49,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:49,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:49:49,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:49:49,918 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 13:49:50,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:50,761 INFO L93 Difference]: Finished difference Result 18431 states and 44151 transitions. [2021-06-05 13:49:50,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:49:50,761 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 13:49:50,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:50,781 INFO L225 Difference]: With dead ends: 18431 [2021-06-05 13:49:50,781 INFO L226 Difference]: Without dead ends: 18317 [2021-06-05 13:49:50,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 441.6ms TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:49:50,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18317 states. [2021-06-05 13:49:50,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18317 to 13282. [2021-06-05 13:49:50,952 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 13:49:50,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13282 states to 13282 states and 33271 transitions. [2021-06-05 13:49:50,972 INFO L78 Accepts]: Start accepts. Automaton has 13282 states and 33271 transitions. Word has length 59 [2021-06-05 13:49:50,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:50,972 INFO L482 AbstractCegarLoop]: Abstraction has 13282 states and 33271 transitions. [2021-06-05 13:49:50,972 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 13:49:50,972 INFO L276 IsEmpty]: Start isEmpty. Operand 13282 states and 33271 transitions. [2021-06-05 13:49:50,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:50,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:50,980 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 13:49:51,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 511 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1078 [2021-06-05 13:49:51,181 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:51,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:51,181 INFO L82 PathProgramCache]: Analyzing trace with hash 285880821, now seen corresponding path program 310 times [2021-06-05 13:49:51,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:51,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380986339] [2021-06-05 13:49:51,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:51,347 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 13:49:51,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:51,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380986339] [2021-06-05 13:49:51,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380986339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:51,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300750743] [2021-06-05 13:49:51,348 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 13:49:51,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:49:51,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:51,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:49:51,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:51,656 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 13:49:51,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300750743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:51,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:51,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-06-05 13:49:51,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380087187] [2021-06-05 13:49:51,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:49:51,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:51,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:49:51,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:49:51,657 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 13:49:52,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:52,649 INFO L93 Difference]: Finished difference Result 13442 states and 33525 transitions. [2021-06-05 13:49:52,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:49:52,650 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 13:49:52,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:52,665 INFO L225 Difference]: With dead ends: 13442 [2021-06-05 13:49:52,666 INFO L226 Difference]: Without dead ends: 13362 [2021-06-05 13:49:52,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 315.1ms TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:49:52,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13362 states. [2021-06-05 13:49:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13362 to 13282. [2021-06-05 13:49:52,817 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 13:49:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13282 states to 13282 states and 33220 transitions. [2021-06-05 13:49:52,837 INFO L78 Accepts]: Start accepts. Automaton has 13282 states and 33220 transitions. Word has length 59 [2021-06-05 13:49:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:52,837 INFO L482 AbstractCegarLoop]: Abstraction has 13282 states and 33220 transitions. [2021-06-05 13:49:52,837 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 13:49:52,837 INFO L276 IsEmpty]: Start isEmpty. Operand 13282 states and 33220 transitions. [2021-06-05 13:49:52,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:52,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:52,846 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 13:49:53,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-06-05 13:49:53,046 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:53,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:53,047 INFO L82 PathProgramCache]: Analyzing trace with hash 233038186, now seen corresponding path program 311 times [2021-06-05 13:49:53,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:53,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833339289] [2021-06-05 13:49:53,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:53,179 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 13:49:53,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:53,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833339289] [2021-06-05 13:49:53,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833339289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:53,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092348869] [2021-06-05 13:49:53,179 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 13:49:53,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 13:49:53,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:53,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:49:53,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:53,469 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 13:49:53,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092348869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:53,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:53,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2021-06-05 13:49:53,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488819700] [2021-06-05 13:49:53,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:49:53,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:53,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:49:53,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:49:53,469 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 13:49:54,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:54,194 INFO L93 Difference]: Finished difference Result 16482 states and 39782 transitions. [2021-06-05 13:49:54,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:49:54,195 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 13:49:54,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:54,214 INFO L225 Difference]: With dead ends: 16482 [2021-06-05 13:49:54,214 INFO L226 Difference]: Without dead ends: 16482 [2021-06-05 13:49:54,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 447.4ms TimeCoverageRelationStatistics Valid=499, Invalid=1223, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 13:49:54,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16482 states. [2021-06-05 13:49:54,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16482 to 13694. [2021-06-05 13:49:54,384 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 13:49:54,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13694 states to 13694 states and 34455 transitions. [2021-06-05 13:49:54,405 INFO L78 Accepts]: Start accepts. Automaton has 13694 states and 34455 transitions. Word has length 59 [2021-06-05 13:49:54,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:54,405 INFO L482 AbstractCegarLoop]: Abstraction has 13694 states and 34455 transitions. [2021-06-05 13:49:54,405 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 13:49:54,405 INFO L276 IsEmpty]: Start isEmpty. Operand 13694 states and 34455 transitions. [2021-06-05 13:49:54,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:49:54,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:54,414 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 13:49:54,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1080,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:54,614 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:54,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:54,614 INFO L82 PathProgramCache]: Analyzing trace with hash -2141933289, now seen corresponding path program 152 times [2021-06-05 13:49:54,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:54,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300654341] [2021-06-05 13:49:54,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:54,754 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 13:49:54,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:54,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300654341] [2021-06-05 13:49:54,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300654341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:54,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909634714] [2021-06-05 13:49:54,754 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 13:49:54,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:49:54,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:54,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:49:54,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:55,603 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 13:49:55,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909634714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:55,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:55,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-06-05 13:49:55,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247511345] [2021-06-05 13:49:55,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 13:49:55,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:55,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 13:49:55,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:49:55,604 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 13:50:05,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:05,483 INFO L93 Difference]: Finished difference Result 28070 states and 65966 transitions. [2021-06-05 13:50:05,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-06-05 13:50:05,484 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 13:50:05,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:05,522 INFO L225 Difference]: With dead ends: 28070 [2021-06-05 13:50:05,523 INFO L226 Difference]: Without dead ends: 27508 [2021-06-05 13:50:05,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23843 ImplicationChecksByTransitivity, 8116.4ms TimeCoverageRelationStatistics Valid=7596, Invalid=53166, Unknown=0, NotChecked=0, Total=60762 [2021-06-05 13:50:05,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27508 states. [2021-06-05 13:50:05,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27508 to 13479. [2021-06-05 13:50:05,789 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 13:50:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13479 states to 13479 states and 34550 transitions. [2021-06-05 13:50:05,813 INFO L78 Accepts]: Start accepts. Automaton has 13479 states and 34550 transitions. Word has length 59 [2021-06-05 13:50:05,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:05,813 INFO L482 AbstractCegarLoop]: Abstraction has 13479 states and 34550 transitions. [2021-06-05 13:50:05,813 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 13:50:05,813 INFO L276 IsEmpty]: Start isEmpty. Operand 13479 states and 34550 transitions. [2021-06-05 13:50:05,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:05,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:05,822 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 13:50:06,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1081,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:06,023 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:06,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:06,023 INFO L82 PathProgramCache]: Analyzing trace with hash 229597463, now seen corresponding path program 312 times [2021-06-05 13:50:06,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:06,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546285862] [2021-06-05 13:50:06,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:06,178 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 13:50:06,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:06,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546285862] [2021-06-05 13:50:06,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546285862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:06,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987230544] [2021-06-05 13:50:06,178 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 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 13:50:06,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 13:50:06,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:06,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:50:06,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:06,467 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 13:50:06,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987230544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:06,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:06,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 13:50:06,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407943667] [2021-06-05 13:50:06,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:50:06,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:06,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:50:06,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:50:06,468 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 13:50:07,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:07,303 INFO L93 Difference]: Finished difference Result 13564 states and 34688 transitions. [2021-06-05 13:50:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:50:07,303 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 13:50:07,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:07,320 INFO L225 Difference]: With dead ends: 13564 [2021-06-05 13:50:07,320 INFO L226 Difference]: Without dead ends: 13496 [2021-06-05 13:50:07,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 264.4ms TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:50:07,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13496 states. [2021-06-05 13:50:07,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13496 to 13479. [2021-06-05 13:50:07,484 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 13:50:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13479 states to 13479 states and 34520 transitions. [2021-06-05 13:50:07,506 INFO L78 Accepts]: Start accepts. Automaton has 13479 states and 34520 transitions. Word has length 59 [2021-06-05 13:50:07,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:07,506 INFO L482 AbstractCegarLoop]: Abstraction has 13479 states and 34520 transitions. [2021-06-05 13:50:07,506 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 13:50:07,506 INFO L276 IsEmpty]: Start isEmpty. Operand 13479 states and 34520 transitions. [2021-06-05 13:50:07,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:07,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:07,515 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 13:50:07,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1091,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:07,716 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:07,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:07,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1178079806, now seen corresponding path program 313 times [2021-06-05 13:50:07,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:07,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028307148] [2021-06-05 13:50:07,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:07,831 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 13:50:07,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:07,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028307148] [2021-06-05 13:50:07,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028307148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:07,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346435788] [2021-06-05 13:50:07,832 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 13:50:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:07,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:50:07,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:07,960 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 13:50:07,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346435788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:07,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:07,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 13:50:07,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916238442] [2021-06-05 13:50:07,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:50:07,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:07,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:50:07,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:50:07,961 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 13:50:08,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:08,390 INFO L93 Difference]: Finished difference Result 16700 states and 41187 transitions. [2021-06-05 13:50:08,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:50:08,390 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 13:50:08,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:08,407 INFO L225 Difference]: With dead ends: 16700 [2021-06-05 13:50:08,408 INFO L226 Difference]: Without dead ends: 16700 [2021-06-05 13:50:08,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 194.4ms TimeCoverageRelationStatistics Valid=219, Invalid=381, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:50:08,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16700 states. [2021-06-05 13:50:08,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16700 to 14028. [2021-06-05 13:50:08,578 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 13:50:08,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14028 states to 14028 states and 36163 transitions. [2021-06-05 13:50:08,603 INFO L78 Accepts]: Start accepts. Automaton has 14028 states and 36163 transitions. Word has length 59 [2021-06-05 13:50:08,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:08,603 INFO L482 AbstractCegarLoop]: Abstraction has 14028 states and 36163 transitions. [2021-06-05 13:50:08,603 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 13:50:08,603 INFO L276 IsEmpty]: Start isEmpty. Operand 14028 states and 36163 transitions. [2021-06-05 13:50:08,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:08,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:08,612 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 13:50:08,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1092,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:08,813 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:08,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:08,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1136189813, now seen corresponding path program 153 times [2021-06-05 13:50:08,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:08,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241712814] [2021-06-05 13:50:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:08,940 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 13:50:08,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:08,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241712814] [2021-06-05 13:50:08,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241712814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:08,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517693604] [2021-06-05 13:50:08,940 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 13:50:08,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 13:50:08,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:08,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:50:08,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:09,059 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 13:50:09,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517693604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:09,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:09,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:50:09,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623183527] [2021-06-05 13:50:09,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:50:09,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:09,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:50:09,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:50:09,060 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 13:50:09,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:09,804 INFO L93 Difference]: Finished difference Result 19202 states and 47249 transitions. [2021-06-05 13:50:09,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:50:09,804 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 13:50:09,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:09,827 INFO L225 Difference]: With dead ends: 19202 [2021-06-05 13:50:09,828 INFO L226 Difference]: Without dead ends: 19070 [2021-06-05 13:50:09,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 313.9ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:50:09,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19070 states. [2021-06-05 13:50:10,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19070 to 13945. [2021-06-05 13:50:10,039 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 13:50:10,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13945 states to 13945 states and 35937 transitions. [2021-06-05 13:50:10,063 INFO L78 Accepts]: Start accepts. Automaton has 13945 states and 35937 transitions. Word has length 59 [2021-06-05 13:50:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:10,063 INFO L482 AbstractCegarLoop]: Abstraction has 13945 states and 35937 transitions. [2021-06-05 13:50:10,063 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 13:50:10,063 INFO L276 IsEmpty]: Start isEmpty. Operand 13945 states and 35937 transitions. [2021-06-05 13:50:10,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:10,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:10,072 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 13:50:10,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1093,517 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:10,272 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:10,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:10,272 INFO L82 PathProgramCache]: Analyzing trace with hash 656626997, now seen corresponding path program 314 times [2021-06-05 13:50:10,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:10,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164414865] [2021-06-05 13:50:10,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:10,413 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 13:50:10,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:10,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164414865] [2021-06-05 13:50:10,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164414865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:10,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442208641] [2021-06-05 13:50:10,413 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 13:50:10,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:50:10,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:10,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:50:10,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:10,650 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 13:50:10,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442208641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:10,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:10,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 13:50:10,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613521538] [2021-06-05 13:50:10,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:50:10,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:10,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:50:10,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:50:10,651 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 13:50:11,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:11,515 INFO L93 Difference]: Finished difference Result 14171 states and 36291 transitions. [2021-06-05 13:50:11,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:50:11,516 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 13:50:11,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:11,536 INFO L225 Difference]: With dead ends: 14171 [2021-06-05 13:50:11,536 INFO L226 Difference]: Without dead ends: 14115 [2021-06-05 13:50:11,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 258.9ms TimeCoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:11,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14115 states. [2021-06-05 13:50:11,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14115 to 13945. [2021-06-05 13:50:11,722 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 13:50:11,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13945 states to 13945 states and 35904 transitions. [2021-06-05 13:50:11,747 INFO L78 Accepts]: Start accepts. Automaton has 13945 states and 35904 transitions. Word has length 59 [2021-06-05 13:50:11,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:11,747 INFO L482 AbstractCegarLoop]: Abstraction has 13945 states and 35904 transitions. [2021-06-05 13:50:11,747 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 13:50:11,747 INFO L276 IsEmpty]: Start isEmpty. Operand 13945 states and 35904 transitions. [2021-06-05 13:50:11,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:11,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:11,826 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 13:50:12,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1094,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:12,027 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:12,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:12,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1251305348, now seen corresponding path program 154 times [2021-06-05 13:50:12,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:12,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616946842] [2021-06-05 13:50:12,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:12,123 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 13:50:12,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:12,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616946842] [2021-06-05 13:50:12,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616946842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:12,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695706933] [2021-06-05 13:50:12,124 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 13:50:12,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:50:12,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:12,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:50:12,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:12,247 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 13:50:12,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695706933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:12,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:12,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 13:50:12,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411407463] [2021-06-05 13:50:12,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:50:12,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:12,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:50:12,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:50:12,248 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 13:50:12,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:12,560 INFO L93 Difference]: Finished difference Result 16427 states and 40999 transitions. [2021-06-05 13:50:12,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:50:12,560 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 13:50:12,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:12,578 INFO L225 Difference]: With dead ends: 16427 [2021-06-05 13:50:12,578 INFO L226 Difference]: Without dead ends: 16325 [2021-06-05 13:50:12,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:50:12,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16325 states. [2021-06-05 13:50:12,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16325 to 12866. [2021-06-05 13:50:12,746 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 13:50:12,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12866 states to 12866 states and 33152 transitions. [2021-06-05 13:50:12,768 INFO L78 Accepts]: Start accepts. Automaton has 12866 states and 33152 transitions. Word has length 59 [2021-06-05 13:50:12,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:12,768 INFO L482 AbstractCegarLoop]: Abstraction has 12866 states and 33152 transitions. [2021-06-05 13:50:12,768 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 13:50:12,768 INFO L276 IsEmpty]: Start isEmpty. Operand 12866 states and 33152 transitions. [2021-06-05 13:50:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:12,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:12,777 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 13:50:12,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1095 [2021-06-05 13:50:12,977 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:12,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:12,977 INFO L82 PathProgramCache]: Analyzing trace with hash -151060374, now seen corresponding path program 315 times [2021-06-05 13:50:12,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:12,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118304371] [2021-06-05 13:50:12,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:13,079 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 13:50:13,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:13,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118304371] [2021-06-05 13:50:13,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118304371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:13,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020473986] [2021-06-05 13:50:13,079 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 13:50:13,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 13:50:13,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:13,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:50:13,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:13,206 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 13:50:13,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020473986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:13,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:13,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 13:50:13,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530837028] [2021-06-05 13:50:13,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:50:13,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:13,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:50:13,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:50:13,207 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 13:50:13,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:13,528 INFO L93 Difference]: Finished difference Result 16089 states and 39723 transitions. [2021-06-05 13:50:13,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:50:13,529 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 13:50:13,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:13,550 INFO L225 Difference]: With dead ends: 16089 [2021-06-05 13:50:13,550 INFO L226 Difference]: Without dead ends: 16089 [2021-06-05 13:50:13,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 154.3ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:50:13,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16089 states. [2021-06-05 13:50:13,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16089 to 13293. [2021-06-05 13:50:13,740 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 13:50:13,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13293 states to 13293 states and 34432 transitions. [2021-06-05 13:50:13,762 INFO L78 Accepts]: Start accepts. Automaton has 13293 states and 34432 transitions. Word has length 59 [2021-06-05 13:50:13,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:13,762 INFO L482 AbstractCegarLoop]: Abstraction has 13293 states and 34432 transitions. [2021-06-05 13:50:13,762 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 13:50:13,762 INFO L276 IsEmpty]: Start isEmpty. Operand 13293 states and 34432 transitions. [2021-06-05 13:50:13,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:13,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:13,771 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 13:50:13,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1101 [2021-06-05 13:50:13,972 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:13,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:13,972 INFO L82 PathProgramCache]: Analyzing trace with hash 541310423, now seen corresponding path program 155 times [2021-06-05 13:50:13,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:13,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691671749] [2021-06-05 13:50:13,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:14,091 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 13:50:14,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:14,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691671749] [2021-06-05 13:50:14,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691671749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:14,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548020721] [2021-06-05 13:50:14,091 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 13:50:14,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 13:50:14,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:14,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:50:14,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:14,211 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 13:50:14,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548020721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:14,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:14,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:50:14,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546871661] [2021-06-05 13:50:14,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:50:14,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:14,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:50:14,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:50:14,212 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 13:50:14,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:14,905 INFO L93 Difference]: Finished difference Result 17164 states and 42755 transitions. [2021-06-05 13:50:14,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:50:14,906 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 13:50:14,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:14,927 INFO L225 Difference]: With dead ends: 17164 [2021-06-05 13:50:14,928 INFO L226 Difference]: Without dead ends: 17150 [2021-06-05 13:50:14,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 266.7ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:50:14,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17150 states. [2021-06-05 13:50:15,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17150 to 13291. [2021-06-05 13:50:15,139 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 13:50:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13291 states to 13291 states and 34467 transitions. [2021-06-05 13:50:15,162 INFO L78 Accepts]: Start accepts. Automaton has 13291 states and 34467 transitions. Word has length 59 [2021-06-05 13:50:15,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:15,163 INFO L482 AbstractCegarLoop]: Abstraction has 13291 states and 34467 transitions. [2021-06-05 13:50:15,163 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 13:50:15,163 INFO L276 IsEmpty]: Start isEmpty. Operand 13291 states and 34467 transitions. [2021-06-05 13:50:15,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:15,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:15,171 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 13:50:15,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1102 [2021-06-05 13:50:15,372 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:15,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:15,372 INFO L82 PathProgramCache]: Analyzing trace with hash 379258327, now seen corresponding path program 316 times [2021-06-05 13:50:15,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:15,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537405642] [2021-06-05 13:50:15,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:15,498 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 13:50:15,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:15,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537405642] [2021-06-05 13:50:15,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537405642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:15,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213942333] [2021-06-05 13:50:15,498 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 13:50:15,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:50:15,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:15,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:50:15,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:15,704 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 13:50:15,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213942333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:15,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:15,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-06-05 13:50:15,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278597387] [2021-06-05 13:50:15,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:50:15,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:15,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:50:15,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:50:15,705 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 13:50:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:16,376 INFO L93 Difference]: Finished difference Result 13395 states and 34626 transitions. [2021-06-05 13:50:16,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:50:16,377 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 13:50:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:16,394 INFO L225 Difference]: With dead ends: 13395 [2021-06-05 13:50:16,394 INFO L226 Difference]: Without dead ends: 13351 [2021-06-05 13:50:16,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 190.2ms TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:50:16,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13351 states. [2021-06-05 13:50:16,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13351 to 13291. [2021-06-05 13:50:16,610 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 13:50:16,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13291 states to 13291 states and 34458 transitions. [2021-06-05 13:50:16,631 INFO L78 Accepts]: Start accepts. Automaton has 13291 states and 34458 transitions. Word has length 59 [2021-06-05 13:50:16,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:16,631 INFO L482 AbstractCegarLoop]: Abstraction has 13291 states and 34458 transitions. [2021-06-05 13:50:16,631 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 13:50:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand 13291 states and 34458 transitions. [2021-06-05 13:50:16,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:16,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:16,639 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 13:50:16,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1103,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:16,840 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:16,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:16,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1601439350, now seen corresponding path program 156 times [2021-06-05 13:50:16,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:16,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138743431] [2021-06-05 13:50:16,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:16,940 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 13:50:16,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:16,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138743431] [2021-06-05 13:50:16,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138743431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:16,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764854296] [2021-06-05 13:50:16,940 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 13:50:16,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 13:50:16,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:16,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:50:16,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:17,101 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 13:50:17,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764854296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:17,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:17,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 19 [2021-06-05 13:50:17,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177424661] [2021-06-05 13:50:17,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:50:17,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:17,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:50:17,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:50:17,102 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 13:50:17,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:17,443 INFO L93 Difference]: Finished difference Result 15297 states and 38508 transitions. [2021-06-05 13:50:17,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:50:17,443 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 13:50:17,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:17,460 INFO L225 Difference]: With dead ends: 15297 [2021-06-05 13:50:17,461 INFO L226 Difference]: Without dead ends: 15243 [2021-06-05 13:50:17,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 161.1ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:50:17,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15243 states. [2021-06-05 13:50:17,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15243 to 13345. [2021-06-05 13:50:17,631 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 13:50:17,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13345 states to 13345 states and 34633 transitions. [2021-06-05 13:50:17,653 INFO L78 Accepts]: Start accepts. Automaton has 13345 states and 34633 transitions. Word has length 59 [2021-06-05 13:50:17,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:17,653 INFO L482 AbstractCegarLoop]: Abstraction has 13345 states and 34633 transitions. [2021-06-05 13:50:17,653 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 13:50:17,653 INFO L276 IsEmpty]: Start isEmpty. Operand 13345 states and 34633 transitions. [2021-06-05 13:50:17,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:17,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:17,661 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 13:50:17,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1104 [2021-06-05 13:50:17,862 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:17,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:17,862 INFO L82 PathProgramCache]: Analyzing trace with hash 815345346, now seen corresponding path program 317 times [2021-06-05 13:50:17,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:17,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991238906] [2021-06-05 13:50:17,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:17,952 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 13:50:17,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:17,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991238906] [2021-06-05 13:50:17,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991238906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:17,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583229543] [2021-06-05 13:50:17,953 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 13:50:17,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 13:50:17,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:17,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:50:17,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:18,100 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 13:50:18,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583229543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:18,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:18,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 16 [2021-06-05 13:50:18,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553335049] [2021-06-05 13:50:18,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:50:18,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:18,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:50:18,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:50:18,101 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 13:50:18,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:18,450 INFO L93 Difference]: Finished difference Result 16957 states and 41994 transitions. [2021-06-05 13:50:18,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:50:18,451 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 13:50:18,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:18,474 INFO L225 Difference]: With dead ends: 16957 [2021-06-05 13:50:18,474 INFO L226 Difference]: Without dead ends: 16957 [2021-06-05 13:50:18,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 145.4ms TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:50:18,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16957 states. [2021-06-05 13:50:18,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16957 to 13816. [2021-06-05 13:50:18,678 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 13:50:18,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13816 states to 13816 states and 36028 transitions. [2021-06-05 13:50:18,702 INFO L78 Accepts]: Start accepts. Automaton has 13816 states and 36028 transitions. Word has length 59 [2021-06-05 13:50:18,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:18,702 INFO L482 AbstractCegarLoop]: Abstraction has 13816 states and 36028 transitions. [2021-06-05 13:50:18,702 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 13:50:18,702 INFO L276 IsEmpty]: Start isEmpty. Operand 13816 states and 36028 transitions. [2021-06-05 13:50:18,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:18,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:18,711 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 13:50:18,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 524 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-06-05 13:50:18,912 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:18,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:18,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1926034251, now seen corresponding path program 157 times [2021-06-05 13:50:18,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:18,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334309966] [2021-06-05 13:50:18,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:19,033 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 13:50:19,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:19,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334309966] [2021-06-05 13:50:19,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334309966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:19,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592580416] [2021-06-05 13:50:19,033 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 13:50:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:19,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:50:19,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:19,155 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 13:50:19,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592580416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:19,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:19,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:50:19,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389015091] [2021-06-05 13:50:19,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:50:19,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:19,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:50:19,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:50:19,156 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 13:50:19,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:19,798 INFO L93 Difference]: Finished difference Result 16406 states and 41478 transitions. [2021-06-05 13:50:19,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:50:19,799 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 13:50:19,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:19,820 INFO L225 Difference]: With dead ends: 16406 [2021-06-05 13:50:19,821 INFO L226 Difference]: Without dead ends: 16388 [2021-06-05 13:50:19,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 233.3ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:50:19,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16388 states. [2021-06-05 13:50:20,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16388 to 13495. [2021-06-05 13:50:20,017 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 13:50:20,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13495 states to 13495 states and 35378 transitions. [2021-06-05 13:50:20,041 INFO L78 Accepts]: Start accepts. Automaton has 13495 states and 35378 transitions. Word has length 59 [2021-06-05 13:50:20,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:20,041 INFO L482 AbstractCegarLoop]: Abstraction has 13495 states and 35378 transitions. [2021-06-05 13:50:20,041 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 13:50:20,041 INFO L276 IsEmpty]: Start isEmpty. Operand 13495 states and 35378 transitions. [2021-06-05 13:50:20,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:20,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:20,051 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 13:50:20,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1111 [2021-06-05 13:50:20,251 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:20,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:20,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2102925195, now seen corresponding path program 318 times [2021-06-05 13:50:20,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:20,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031344459] [2021-06-05 13:50:20,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:20,364 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 13:50:20,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:20,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031344459] [2021-06-05 13:50:20,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031344459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:20,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061858922] [2021-06-05 13:50:20,365 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 13:50:20,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 13:50:20,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:20,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:50:20,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:20,543 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 13:50:20,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061858922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:20,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:20,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 13:50:20,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876788057] [2021-06-05 13:50:20,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:50:20,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:20,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:50:20,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:50:20,544 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 13:50:21,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:21,155 INFO L93 Difference]: Finished difference Result 13544 states and 35453 transitions. [2021-06-05 13:50:21,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:50:21,156 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 13:50:21,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:21,172 INFO L225 Difference]: With dead ends: 13544 [2021-06-05 13:50:21,172 INFO L226 Difference]: Without dead ends: 13512 [2021-06-05 13:50:21,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:50:21,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13512 states. [2021-06-05 13:50:21,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13512 to 13495. [2021-06-05 13:50:21,365 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 13:50:21,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13495 states to 13495 states and 35372 transitions. [2021-06-05 13:50:21,386 INFO L78 Accepts]: Start accepts. Automaton has 13495 states and 35372 transitions. Word has length 59 [2021-06-05 13:50:21,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:21,386 INFO L482 AbstractCegarLoop]: Abstraction has 13495 states and 35372 transitions. [2021-06-05 13:50:21,386 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 13:50:21,386 INFO L276 IsEmpty]: Start isEmpty. Operand 13495 states and 35372 transitions. [2021-06-05 13:50:21,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:21,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:21,395 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 13:50:21,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1112 [2021-06-05 13:50:21,596 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:21,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:21,596 INFO L82 PathProgramCache]: Analyzing trace with hash 513630058, now seen corresponding path program 319 times [2021-06-05 13:50:21,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:21,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144160779] [2021-06-05 13:50:21,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:21,677 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 13:50:21,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:21,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144160779] [2021-06-05 13:50:21,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144160779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:21,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189605012] [2021-06-05 13:50:21,677 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 13:50:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:21,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:50:21,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:21,814 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 13:50:21,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189605012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:21,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:21,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 13:50:21,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076450803] [2021-06-05 13:50:21,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:50:21,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:21,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:50:21,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:50:21,814 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 13:50:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:22,073 INFO L93 Difference]: Finished difference Result 16977 states and 42453 transitions. [2021-06-05 13:50:22,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:50:22,073 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 13:50:22,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:22,093 INFO L225 Difference]: With dead ends: 16977 [2021-06-05 13:50:22,093 INFO L226 Difference]: Without dead ends: 16977 [2021-06-05 13:50:22,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:50:22,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16977 states. [2021-06-05 13:50:22,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16977 to 14002. [2021-06-05 13:50:22,280 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 13:50:22,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14002 states to 14002 states and 36871 transitions. [2021-06-05 13:50:22,302 INFO L78 Accepts]: Start accepts. Automaton has 14002 states and 36871 transitions. Word has length 59 [2021-06-05 13:50:22,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:22,302 INFO L482 AbstractCegarLoop]: Abstraction has 14002 states and 36871 transitions. [2021-06-05 13:50:22,302 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 13:50:22,302 INFO L276 IsEmpty]: Start isEmpty. Operand 14002 states and 36871 transitions. [2021-06-05 13:50:22,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:22,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:22,310 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 13:50:22,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 527 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1113 [2021-06-05 13:50:22,511 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:22,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:22,511 INFO L82 PathProgramCache]: Analyzing trace with hash -257205609, now seen corresponding path program 158 times [2021-06-05 13:50:22,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:22,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990783046] [2021-06-05 13:50:22,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:22,607 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 13:50:22,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:22,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990783046] [2021-06-05 13:50:22,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990783046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:22,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528001931] [2021-06-05 13:50:22,607 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 13:50:22,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:50:22,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:22,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:50:22,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:22,725 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 13:50:22,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528001931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:22,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:22,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:50:22,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383148291] [2021-06-05 13:50:22,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:50:22,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:22,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:50:22,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:50:22,725 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 13:50:23,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:23,311 INFO L93 Difference]: Finished difference Result 15466 states and 39872 transitions. [2021-06-05 13:50:23,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:50:23,311 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 13:50:23,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:23,330 INFO L225 Difference]: With dead ends: 15466 [2021-06-05 13:50:23,330 INFO L226 Difference]: Without dead ends: 15466 [2021-06-05 13:50:23,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 182.1ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:23,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15466 states. [2021-06-05 13:50:23,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15466 to 14020. [2021-06-05 13:50:23,508 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 13:50:23,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14020 states to 14020 states and 36922 transitions. [2021-06-05 13:50:23,532 INFO L78 Accepts]: Start accepts. Automaton has 14020 states and 36922 transitions. Word has length 59 [2021-06-05 13:50:23,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:23,533 INFO L482 AbstractCegarLoop]: Abstraction has 14020 states and 36922 transitions. [2021-06-05 13:50:23,533 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 13:50:23,533 INFO L276 IsEmpty]: Start isEmpty. Operand 14020 states and 36922 transitions. [2021-06-05 13:50:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:23,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:23,541 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 13:50:23,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1116 [2021-06-05 13:50:23,742 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:23,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:23,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1890501993, now seen corresponding path program 320 times [2021-06-05 13:50:23,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:23,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420834785] [2021-06-05 13:50:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:23,854 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 13:50:23,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:23,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420834785] [2021-06-05 13:50:23,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420834785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:23,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176545077] [2021-06-05 13:50:23,855 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 13:50:23,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:50:23,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:23,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:50:23,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:24,008 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 13:50:24,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176545077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:24,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:24,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 13:50:24,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772995662] [2021-06-05 13:50:24,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:50:24,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:24,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:50:24,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:50:24,009 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 13:50:24,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:24,446 INFO L93 Difference]: Finished difference Result 14088 states and 37021 transitions. [2021-06-05 13:50:24,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:50:24,446 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 13:50:24,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:24,466 INFO L225 Difference]: With dead ends: 14088 [2021-06-05 13:50:24,466 INFO L226 Difference]: Without dead ends: 14068 [2021-06-05 13:50:24,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:50:24,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14068 states. [2021-06-05 13:50:24,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14068 to 14020. [2021-06-05 13:50:24,639 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 13:50:24,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14020 states to 14020 states and 36919 transitions. [2021-06-05 13:50:24,663 INFO L78 Accepts]: Start accepts. Automaton has 14020 states and 36919 transitions. Word has length 59 [2021-06-05 13:50:24,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:24,663 INFO L482 AbstractCegarLoop]: Abstraction has 14020 states and 36919 transitions. [2021-06-05 13:50:24,663 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 13:50:24,663 INFO L276 IsEmpty]: Start isEmpty. Operand 14020 states and 36919 transitions. [2021-06-05 13:50:24,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:24,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:24,672 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 13:50:24,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1117,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:24,873 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:24,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:24,873 INFO L82 PathProgramCache]: Analyzing trace with hash -336914294, now seen corresponding path program 159 times [2021-06-05 13:50:24,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:24,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644488389] [2021-06-05 13:50:24,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:24,956 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 13:50:24,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:24,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644488389] [2021-06-05 13:50:24,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644488389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:24,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763041201] [2021-06-05 13:50:24,956 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 13:50:24,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 13:50:24,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:24,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:50:24,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:25,079 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 13:50:25,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763041201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:25,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:25,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:50:25,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866931193] [2021-06-05 13:50:25,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:50:25,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:25,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:50:25,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:50:25,080 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 13:50:25,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:25,307 INFO L93 Difference]: Finished difference Result 15125 states and 39073 transitions. [2021-06-05 13:50:25,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:50:25,308 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 13:50:25,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:25,326 INFO L225 Difference]: With dead ends: 15125 [2021-06-05 13:50:25,327 INFO L226 Difference]: Without dead ends: 15103 [2021-06-05 13:50:25,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:50:25,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15103 states. [2021-06-05 13:50:25,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15103 to 13957. [2021-06-05 13:50:25,498 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 13:50:25,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13957 states to 13957 states and 36783 transitions. [2021-06-05 13:50:25,520 INFO L78 Accepts]: Start accepts. Automaton has 13957 states and 36783 transitions. Word has length 59 [2021-06-05 13:50:25,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:25,520 INFO L482 AbstractCegarLoop]: Abstraction has 13957 states and 36783 transitions. [2021-06-05 13:50:25,520 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 13:50:25,521 INFO L276 IsEmpty]: Start isEmpty. Operand 13957 states and 36783 transitions. [2021-06-05 13:50:25,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:25,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:25,529 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 13:50:25,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1118,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:25,729 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:25,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:25,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1535027189, now seen corresponding path program 160 times [2021-06-05 13:50:25,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:25,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465639829] [2021-06-05 13:50:25,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:25,896 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 13:50:25,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:25,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465639829] [2021-06-05 13:50:25,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465639829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:25,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993121923] [2021-06-05 13:50:25,896 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 13:50:25,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:50:25,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:25,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:50:25,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:26,012 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 13:50:26,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993121923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:26,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:26,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:50:26,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591001614] [2021-06-05 13:50:26,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:50:26,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:26,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:50:26,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:50:26,013 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 13:50:26,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:26,615 INFO L93 Difference]: Finished difference Result 14854 states and 38533 transitions. [2021-06-05 13:50:26,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:50:26,615 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 13:50:26,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:26,634 INFO L225 Difference]: With dead ends: 14854 [2021-06-05 13:50:26,634 INFO L226 Difference]: Without dead ends: 14846 [2021-06-05 13:50:26,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 222.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:50:26,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14846 states. [2021-06-05 13:50:26,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14846 to 14042. [2021-06-05 13:50:26,810 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 13:50:26,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14042 states to 14042 states and 36979 transitions. [2021-06-05 13:50:26,833 INFO L78 Accepts]: Start accepts. Automaton has 14042 states and 36979 transitions. Word has length 59 [2021-06-05 13:50:26,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:26,833 INFO L482 AbstractCegarLoop]: Abstraction has 14042 states and 36979 transitions. [2021-06-05 13:50:26,833 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 13:50:26,833 INFO L276 IsEmpty]: Start isEmpty. Operand 14042 states and 36979 transitions. [2021-06-05 13:50:26,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:26,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:26,842 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 13:50:27,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1122 [2021-06-05 13:50:27,042 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:27,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:27,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1259607115, now seen corresponding path program 321 times [2021-06-05 13:50:27,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:27,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247000327] [2021-06-05 13:50:27,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:27,131 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 13:50:27,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:27,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247000327] [2021-06-05 13:50:27,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247000327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:27,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94366755] [2021-06-05 13:50:27,131 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 13:50:27,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 13:50:27,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:27,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:50:27,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:27,266 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 13:50:27,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94366755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:27,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:27,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 13:50:27,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219630101] [2021-06-05 13:50:27,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:50:27,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:27,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:50:27,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:50:27,266 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 13:50:28,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:28,030 INFO L93 Difference]: Finished difference Result 14554 states and 37840 transitions. [2021-06-05 13:50:28,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:50:28,031 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 13:50:28,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:28,048 INFO L225 Difference]: With dead ends: 14554 [2021-06-05 13:50:28,049 INFO L226 Difference]: Without dead ends: 14403 [2021-06-05 13:50:28,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 153.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:50:28,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14403 states. [2021-06-05 13:50:28,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14403 to 13894. [2021-06-05 13:50:28,223 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 13:50:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13894 states to 13894 states and 36632 transitions. [2021-06-05 13:50:28,247 INFO L78 Accepts]: Start accepts. Automaton has 13894 states and 36632 transitions. Word has length 59 [2021-06-05 13:50:28,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:28,247 INFO L482 AbstractCegarLoop]: Abstraction has 13894 states and 36632 transitions. [2021-06-05 13:50:28,247 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 13:50:28,247 INFO L276 IsEmpty]: Start isEmpty. Operand 13894 states and 36632 transitions. [2021-06-05 13:50:28,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:28,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:28,255 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 13:50:28,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-06-05 13:50:28,456 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:28,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:28,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1873143295, now seen corresponding path program 322 times [2021-06-05 13:50:28,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:28,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533046934] [2021-06-05 13:50:28,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:28,554 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 13:50:28,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:28,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533046934] [2021-06-05 13:50:28,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533046934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:28,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867466417] [2021-06-05 13:50:28,554 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 13:50:28,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:50:28,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:28,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:50:28,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:28,673 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 13:50:28,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867466417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:28,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:28,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:50:28,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144741405] [2021-06-05 13:50:28,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:50:28,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:28,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:50:28,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:50:28,673 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 13:50:29,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:29,194 INFO L93 Difference]: Finished difference Result 14649 states and 38103 transitions. [2021-06-05 13:50:29,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:50:29,194 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 13:50:29,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:29,211 INFO L225 Difference]: With dead ends: 14649 [2021-06-05 13:50:29,211 INFO L226 Difference]: Without dead ends: 14637 [2021-06-05 13:50:29,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 154.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:50:29,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14637 states. [2021-06-05 13:50:29,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14637 to 13896. [2021-06-05 13:50:29,376 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 13:50:29,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13896 states to 13896 states and 36636 transitions. [2021-06-05 13:50:29,398 INFO L78 Accepts]: Start accepts. Automaton has 13896 states and 36636 transitions. Word has length 59 [2021-06-05 13:50:29,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:29,398 INFO L482 AbstractCegarLoop]: Abstraction has 13896 states and 36636 transitions. [2021-06-05 13:50:29,398 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 13:50:29,398 INFO L276 IsEmpty]: Start isEmpty. Operand 13896 states and 36636 transitions. [2021-06-05 13:50:29,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:29,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:29,406 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 13:50:29,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1124 [2021-06-05 13:50:29,607 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:29,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:29,607 INFO L82 PathProgramCache]: Analyzing trace with hash 773466498, now seen corresponding path program 323 times [2021-06-05 13:50:29,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:29,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119649754] [2021-06-05 13:50:29,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:29,686 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 13:50:29,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:29,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119649754] [2021-06-05 13:50:29,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119649754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:29,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578853354] [2021-06-05 13:50:29,686 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 13:50:29,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 13:50:29,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:29,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:50:29,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:29,827 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 13:50:29,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578853354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:29,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:29,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-05 13:50:29,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398634515] [2021-06-05 13:50:29,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:50:29,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:29,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:50:29,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:50:29,828 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 13:50:30,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:30,058 INFO L93 Difference]: Finished difference Result 16479 states and 41384 transitions. [2021-06-05 13:50:30,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:50:30,059 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 13:50:30,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:30,078 INFO L225 Difference]: With dead ends: 16479 [2021-06-05 13:50:30,078 INFO L226 Difference]: Without dead ends: 16473 [2021-06-05 13:50:30,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:50:30,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16473 states. [2021-06-05 13:50:30,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16473 to 13895. [2021-06-05 13:50:30,315 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 13:50:30,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13895 states to 13895 states and 36629 transitions. [2021-06-05 13:50:30,336 INFO L78 Accepts]: Start accepts. Automaton has 13895 states and 36629 transitions. Word has length 59 [2021-06-05 13:50:30,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:30,336 INFO L482 AbstractCegarLoop]: Abstraction has 13895 states and 36629 transitions. [2021-06-05 13:50:30,336 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 13:50:30,336 INFO L276 IsEmpty]: Start isEmpty. Operand 13895 states and 36629 transitions. [2021-06-05 13:50:30,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:30,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:30,345 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 13:50:30,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1125,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:30,545 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:30,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:30,546 INFO L82 PathProgramCache]: Analyzing trace with hash 268774039, now seen corresponding path program 324 times [2021-06-05 13:50:30,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:30,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116597545] [2021-06-05 13:50:30,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:30,640 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 13:50:30,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:30,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116597545] [2021-06-05 13:50:30,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116597545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:30,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497206260] [2021-06-05 13:50:30,640 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 13:50:30,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 13:50:30,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:30,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:50:30,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:30,760 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 13:50:30,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497206260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:30,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:30,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:50:30,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195617816] [2021-06-05 13:50:30,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:50:30,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:30,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:50:30,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:50:30,761 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 13:50:31,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:31,554 INFO L93 Difference]: Finished difference Result 16130 states and 41196 transitions. [2021-06-05 13:50:31,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 13:50:31,555 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 13:50:31,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:31,573 INFO L225 Difference]: With dead ends: 16130 [2021-06-05 13:50:31,573 INFO L226 Difference]: Without dead ends: 16076 [2021-06-05 13:50:31,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 297.6ms TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:50:31,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16076 states. [2021-06-05 13:50:31,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16076 to 14050. [2021-06-05 13:50:31,749 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 13:50:31,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14050 states to 14050 states and 37031 transitions. [2021-06-05 13:50:31,771 INFO L78 Accepts]: Start accepts. Automaton has 14050 states and 37031 transitions. Word has length 59 [2021-06-05 13:50:31,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:31,771 INFO L482 AbstractCegarLoop]: Abstraction has 14050 states and 37031 transitions. [2021-06-05 13:50:31,771 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 13:50:31,771 INFO L276 IsEmpty]: Start isEmpty. Operand 14050 states and 37031 transitions. [2021-06-05 13:50:31,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:31,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:31,779 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 13:50:31,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1128 [2021-06-05 13:50:31,980 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:31,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:31,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1801333148, now seen corresponding path program 325 times [2021-06-05 13:50:31,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:31,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067273988] [2021-06-05 13:50:31,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:32,066 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 13:50:32,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:32,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067273988] [2021-06-05 13:50:32,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067273988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:32,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192350649] [2021-06-05 13:50:32,067 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 13:50:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:32,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:50:32,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:32,182 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 13:50:32,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192350649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:32,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:32,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:50:32,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608677120] [2021-06-05 13:50:32,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:50:32,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:32,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:50:32,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:50:32,183 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 13:50:32,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:32,397 INFO L93 Difference]: Finished difference Result 16536 states and 41568 transitions. [2021-06-05 13:50:32,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:50:32,398 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 13:50:32,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:32,419 INFO L225 Difference]: With dead ends: 16536 [2021-06-05 13:50:32,419 INFO L226 Difference]: Without dead ends: 16518 [2021-06-05 13:50:32,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:50:32,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16518 states. [2021-06-05 13:50:32,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16518 to 14050. [2021-06-05 13:50:32,624 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 13:50:32,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14050 states to 14050 states and 37024 transitions. [2021-06-05 13:50:32,646 INFO L78 Accepts]: Start accepts. Automaton has 14050 states and 37024 transitions. Word has length 59 [2021-06-05 13:50:32,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:32,646 INFO L482 AbstractCegarLoop]: Abstraction has 14050 states and 37024 transitions. [2021-06-05 13:50:32,646 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 13:50:32,646 INFO L276 IsEmpty]: Start isEmpty. Operand 14050 states and 37024 transitions. [2021-06-05 13:50:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:32,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:32,654 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 13:50:32,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1129 [2021-06-05 13:50:32,854 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:32,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:32,854 INFO L82 PathProgramCache]: Analyzing trace with hash 423610573, now seen corresponding path program 326 times [2021-06-05 13:50:32,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:32,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186936383] [2021-06-05 13:50:32,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:32,959 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 13:50:32,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:32,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186936383] [2021-06-05 13:50:32,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186936383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:32,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175672731] [2021-06-05 13:50:32,960 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 13:50:32,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:50:32,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:32,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 13:50:32,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:33,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 13:50:33,114 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 13:50:33,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:50:33,117 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 13:50:33,117 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 13:50:33,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:50:33,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 13:50:33,124 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 13:50:33,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175672731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:33,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:33,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2021-06-05 13:50:33,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39399934] [2021-06-05 13:50:33,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:50:33,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:33,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:50:33,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:50:33,125 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 13:50:34,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:34,491 INFO L93 Difference]: Finished difference Result 19628 states and 48599 transitions. [2021-06-05 13:50:34,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 13:50:34,491 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 13:50:34,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:34,514 INFO L225 Difference]: With dead ends: 19628 [2021-06-05 13:50:34,514 INFO L226 Difference]: Without dead ends: 19460 [2021-06-05 13:50:34,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 631.4ms TimeCoverageRelationStatistics Valid=375, Invalid=3531, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 13:50:34,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19460 states. [2021-06-05 13:50:34,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19460 to 14519. [2021-06-05 13:50:34,730 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 13:50:34,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14519 states to 14519 states and 38152 transitions. [2021-06-05 13:50:34,756 INFO L78 Accepts]: Start accepts. Automaton has 14519 states and 38152 transitions. Word has length 59 [2021-06-05 13:50:34,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:34,756 INFO L482 AbstractCegarLoop]: Abstraction has 14519 states and 38152 transitions. [2021-06-05 13:50:34,756 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 13:50:34,756 INFO L276 IsEmpty]: Start isEmpty. Operand 14519 states and 38152 transitions. [2021-06-05 13:50:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:34,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:34,765 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 13:50:34,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1133 [2021-06-05 13:50:34,966 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:34,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:34,966 INFO L82 PathProgramCache]: Analyzing trace with hash 810213250, now seen corresponding path program 327 times [2021-06-05 13:50:34,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:34,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13938359] [2021-06-05 13:50:34,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:35,147 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 13:50:35,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:35,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13938359] [2021-06-05 13:50:35,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13938359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:35,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789039201] [2021-06-05 13:50:35,148 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 13:50:35,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 13:50:35,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:35,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:50:35,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:35,267 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 13:50:35,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789039201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:35,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:35,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 13:50:35,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638055954] [2021-06-05 13:50:35,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:50:35,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:35,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:50:35,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:50:35,267 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 13:50:35,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:35,481 INFO L93 Difference]: Finished difference Result 17127 states and 42923 transitions. [2021-06-05 13:50:35,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:50:35,482 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 13:50:35,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:35,503 INFO L225 Difference]: With dead ends: 17127 [2021-06-05 13:50:35,504 INFO L226 Difference]: Without dead ends: 17100 [2021-06-05 13:50:35,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:50:35,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17100 states. [2021-06-05 13:50:35,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17100 to 14519. [2021-06-05 13:50:35,713 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 13:50:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14519 states to 14519 states and 38149 transitions. [2021-06-05 13:50:35,738 INFO L78 Accepts]: Start accepts. Automaton has 14519 states and 38149 transitions. Word has length 59 [2021-06-05 13:50:35,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:35,739 INFO L482 AbstractCegarLoop]: Abstraction has 14519 states and 38149 transitions. [2021-06-05 13:50:35,739 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 13:50:35,739 INFO L276 IsEmpty]: Start isEmpty. Operand 14519 states and 38149 transitions. [2021-06-05 13:50:35,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:35,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:35,748 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 13:50:35,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-06-05 13:50:35,948 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:35,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:35,948 INFO L82 PathProgramCache]: Analyzing trace with hash 363919063, now seen corresponding path program 328 times [2021-06-05 13:50:35,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:35,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924040069] [2021-06-05 13:50:35,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:36,064 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 13:50:36,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:36,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924040069] [2021-06-05 13:50:36,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924040069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:36,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912865294] [2021-06-05 13:50:36,065 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 13:50:36,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:50:36,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:36,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 13:50:36,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:36,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 13:50:36,231 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 13:50:36,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:50:36,233 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 13:50:36,233 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 13:50:36,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:50:36,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 13:50:36,241 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 13:50:36,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912865294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:36,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:36,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 13:50:36,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448219781] [2021-06-05 13:50:36,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:50:36,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:36,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:50:36,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:50:36,241 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 13:50:38,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:38,449 INFO L93 Difference]: Finished difference Result 27358 states and 65118 transitions. [2021-06-05 13:50:38,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 13:50:38,450 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 13:50:38,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:38,486 INFO L225 Difference]: With dead ends: 27358 [2021-06-05 13:50:38,487 INFO L226 Difference]: Without dead ends: 26914 [2021-06-05 13:50:38,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4638 ImplicationChecksByTransitivity, 1324.4ms TimeCoverageRelationStatistics Valid=969, Invalid=11241, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 13:50:38,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26914 states. [2021-06-05 13:50:38,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26914 to 15487. [2021-06-05 13:50:38,757 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 13:50:38,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15487 states to 15487 states and 40440 transitions. [2021-06-05 13:50:38,784 INFO L78 Accepts]: Start accepts. Automaton has 15487 states and 40440 transitions. Word has length 59 [2021-06-05 13:50:38,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:38,784 INFO L482 AbstractCegarLoop]: Abstraction has 15487 states and 40440 transitions. [2021-06-05 13:50:38,784 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 13:50:38,784 INFO L276 IsEmpty]: Start isEmpty. Operand 15487 states and 40440 transitions. [2021-06-05 13:50:38,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:38,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:38,793 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 13:50:38,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1139,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:38,994 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:38,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:38,994 INFO L82 PathProgramCache]: Analyzing trace with hash -2037475364, now seen corresponding path program 329 times [2021-06-05 13:50:38,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:38,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555453831] [2021-06-05 13:50:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:39,100 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 13:50:39,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:39,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555453831] [2021-06-05 13:50:39,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555453831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:39,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018966770] [2021-06-05 13:50:39,100 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 13:50:39,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 13:50:39,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:39,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:50:39,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:39,246 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 13:50:39,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018966770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:39,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:39,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 17 [2021-06-05 13:50:39,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097554111] [2021-06-05 13:50:39,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:50:39,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:39,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:50:39,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:50:39,247 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 13:50:39,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:39,525 INFO L93 Difference]: Finished difference Result 18492 states and 46004 transitions. [2021-06-05 13:50:39,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:50:39,525 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 13:50:39,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:39,554 INFO L225 Difference]: With dead ends: 18492 [2021-06-05 13:50:39,554 INFO L226 Difference]: Without dead ends: 18456 [2021-06-05 13:50:39,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:50:39,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18456 states. [2021-06-05 13:50:39,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18456 to 15487. [2021-06-05 13:50:39,825 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 13:50:39,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15487 states to 15487 states and 40437 transitions. [2021-06-05 13:50:39,850 INFO L78 Accepts]: Start accepts. Automaton has 15487 states and 40437 transitions. Word has length 59 [2021-06-05 13:50:39,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:39,850 INFO L482 AbstractCegarLoop]: Abstraction has 15487 states and 40437 transitions. [2021-06-05 13:50:39,850 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 13:50:39,850 INFO L276 IsEmpty]: Start isEmpty. Operand 15487 states and 40437 transitions. [2021-06-05 13:50:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:39,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:39,859 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 13:50:40,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1140,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:40,059 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:40,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:40,059 INFO L82 PathProgramCache]: Analyzing trace with hash 210605197, now seen corresponding path program 330 times [2021-06-05 13:50:40,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:40,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287139405] [2021-06-05 13:50:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:40,186 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 13:50:40,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:40,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287139405] [2021-06-05 13:50:40,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287139405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:40,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295995543] [2021-06-05 13:50:40,187 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 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 13:50:40,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 13:50:40,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:40,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:50:40,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:40,303 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 13:50:40,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295995543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:40,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:40,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:50:40,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537591656] [2021-06-05 13:50:40,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:50:40,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:40,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:50:40,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:50:40,304 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 13:50:44,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:44,226 INFO L93 Difference]: Finished difference Result 44514 states and 101971 transitions. [2021-06-05 13:50:44,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-06-05 13:50:44,227 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 13:50:44,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:44,281 INFO L225 Difference]: With dead ends: 44514 [2021-06-05 13:50:44,281 INFO L226 Difference]: Without dead ends: 43374 [2021-06-05 13:50:44,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15415 ImplicationChecksByTransitivity, 2747.1ms TimeCoverageRelationStatistics Valid=2427, Invalid=33863, Unknown=0, NotChecked=0, Total=36290 [2021-06-05 13:50:44,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43374 states. [2021-06-05 13:50:44,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43374 to 17204. [2021-06-05 13:50:44,646 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 13:50:44,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17204 states to 17204 states and 44491 transitions. [2021-06-05 13:50:44,674 INFO L78 Accepts]: Start accepts. Automaton has 17204 states and 44491 transitions. Word has length 59 [2021-06-05 13:50:44,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:44,674 INFO L482 AbstractCegarLoop]: Abstraction has 17204 states and 44491 transitions. [2021-06-05 13:50:44,674 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 13:50:44,674 INFO L276 IsEmpty]: Start isEmpty. Operand 17204 states and 44491 transitions. [2021-06-05 13:50:44,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:44,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:44,683 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 13:50:44,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1146 [2021-06-05 13:50:44,884 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:44,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:44,884 INFO L82 PathProgramCache]: Analyzing trace with hash 960022850, now seen corresponding path program 331 times [2021-06-05 13:50:44,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:44,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959058956] [2021-06-05 13:50:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:45,089 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 13:50:45,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:45,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959058956] [2021-06-05 13:50:45,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959058956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:45,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211727021] [2021-06-05 13:50:45,089 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 13:50:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:45,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:50:45,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:45,204 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 13:50:45,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211727021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:45,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:45,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 13:50:45,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044007605] [2021-06-05 13:50:45,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:50:45,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:45,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:50:45,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:50:45,205 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 13:50:45,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:45,467 INFO L93 Difference]: Finished difference Result 20471 states and 50544 transitions. [2021-06-05 13:50:45,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:50:45,467 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 13:50:45,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:45,493 INFO L225 Difference]: With dead ends: 20471 [2021-06-05 13:50:45,493 INFO L226 Difference]: Without dead ends: 20426 [2021-06-05 13:50:45,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:50:45,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20426 states. [2021-06-05 13:50:45,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20426 to 17204. [2021-06-05 13:50:45,728 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 13:50:45,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17204 states to 17204 states and 44488 transitions. [2021-06-05 13:50:45,757 INFO L78 Accepts]: Start accepts. Automaton has 17204 states and 44488 transitions. Word has length 59 [2021-06-05 13:50:45,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:45,757 INFO L482 AbstractCegarLoop]: Abstraction has 17204 states and 44488 transitions. [2021-06-05 13:50:45,757 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 13:50:45,757 INFO L276 IsEmpty]: Start isEmpty. Operand 17204 states and 44488 transitions. [2021-06-05 13:50:45,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:45,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:45,766 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 13:50:45,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1147,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:45,967 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:45,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:45,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1612541161, now seen corresponding path program 332 times [2021-06-05 13:50:45,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:45,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75768532] [2021-06-05 13:50:45,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:46,107 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 13:50:46,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:46,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75768532] [2021-06-05 13:50:46,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75768532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:46,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673869339] [2021-06-05 13:50:46,107 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 13:50:46,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:50:46,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:46,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 13:50:46,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:46,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 13:50:46,325 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 13:50:46,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:50:46,328 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 13:50:46,328 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 13:50:46,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:50:46,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 13:50:46,336 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 13:50:46,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673869339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:46,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:46,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 13:50:46,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292881240] [2021-06-05 13:50:46,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:50:46,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:46,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:50:46,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:46,336 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 13:50:53,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:53,639 INFO L93 Difference]: Finished difference Result 88879 states and 197085 transitions. [2021-06-05 13:50:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2021-06-05 13:50:53,639 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 13:50:53,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:53,759 INFO L225 Difference]: With dead ends: 88879 [2021-06-05 13:50:53,759 INFO L226 Difference]: Without dead ends: 85405 [2021-06-05 13:50:53,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45804 ImplicationChecksByTransitivity, 5727.5ms TimeCoverageRelationStatistics Valid=5829, Invalid=95613, Unknown=0, NotChecked=0, Total=101442 [2021-06-05 13:50:53,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85405 states. [2021-06-05 13:50:54,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85405 to 19930. [2021-06-05 13:50:54,381 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 13:50:54,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19930 states to 19930 states and 50957 transitions. [2021-06-05 13:50:54,414 INFO L78 Accepts]: Start accepts. Automaton has 19930 states and 50957 transitions. Word has length 59 [2021-06-05 13:50:54,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:54,414 INFO L482 AbstractCegarLoop]: Abstraction has 19930 states and 50957 transitions. [2021-06-05 13:50:54,414 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 13:50:54,414 INFO L276 IsEmpty]: Start isEmpty. Operand 19930 states and 50957 transitions. [2021-06-05 13:50:54,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:54,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:54,424 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 13:50:54,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-06-05 13:50:54,625 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:54,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:54,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1530702308, now seen corresponding path program 333 times [2021-06-05 13:50:54,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:54,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775384159] [2021-06-05 13:50:54,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:54,759 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 13:50:54,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:54,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775384159] [2021-06-05 13:50:54,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775384159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:54,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131216114] [2021-06-05 13:50:54,759 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 13:50:54,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 13:50:54,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:54,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:50:54,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:54,885 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 13:50:54,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131216114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:54,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:54,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 13:50:54,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244586726] [2021-06-05 13:50:54,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:50:54,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:54,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:50:54,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:50:54,886 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 13:50:55,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:55,210 INFO L93 Difference]: Finished difference Result 23966 states and 58492 transitions. [2021-06-05 13:50:55,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:50:55,211 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 13:50:55,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:55,238 INFO L225 Difference]: With dead ends: 23966 [2021-06-05 13:50:55,238 INFO L226 Difference]: Without dead ends: 23912 [2021-06-05 13:50:55,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:55,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23912 states. [2021-06-05 13:50:55,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23912 to 19930. [2021-06-05 13:50:55,502 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 13:50:55,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19930 states to 19930 states and 50954 transitions. [2021-06-05 13:50:55,534 INFO L78 Accepts]: Start accepts. Automaton has 19930 states and 50954 transitions. Word has length 59 [2021-06-05 13:50:55,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:55,534 INFO L482 AbstractCegarLoop]: Abstraction has 19930 states and 50954 transitions. [2021-06-05 13:50:55,534 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 13:50:55,534 INFO L276 IsEmpty]: Start isEmpty. Operand 19930 states and 50954 transitions. [2021-06-05 13:50:55,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:50:55,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:55,544 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 13:50:55,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1155 [2021-06-05 13:50:55,744 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:55,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:55,744 INFO L82 PathProgramCache]: Analyzing trace with hash -809267123, now seen corresponding path program 334 times [2021-06-05 13:50:55,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:55,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330206940] [2021-06-05 13:50:55,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:55,897 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 13:50:55,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:55,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330206940] [2021-06-05 13:50:55,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330206940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:55,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463008876] [2021-06-05 13:50:55,898 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 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 13:50:55,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:50:55,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:55,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 13:50:55,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:56,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 13:50:56,138 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 13:50:56,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:50:56,141 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 13:50:56,141 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 13:50:56,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:50:56,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 13:50:56,148 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 13:50:56,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463008876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:56,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:56,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-05 13:50:56,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526854246] [2021-06-05 13:50:56,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:50:56,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:56,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:50:56,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:50:56,149 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 13:51:08,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:08,746 INFO L93 Difference]: Finished difference Result 96650 states and 218441 transitions. [2021-06-05 13:51:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 511 states. [2021-06-05 13:51:08,746 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 13:51:08,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:08,898 INFO L225 Difference]: With dead ends: 96650 [2021-06-05 13:51:08,898 INFO L226 Difference]: Without dead ends: 93908 [2021-06-05 13:51:08,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 509 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122443 ImplicationChecksByTransitivity, 10927.4ms TimeCoverageRelationStatistics Valid=13119, Invalid=247491, Unknown=0, NotChecked=0, Total=260610 [2021-06-05 13:51:09,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93908 states. [2021-06-05 13:51:09,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93908 to 23705. [2021-06-05 13:51:09,609 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 13:51:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23705 states to 23705 states and 60046 transitions. [2021-06-05 13:51:09,650 INFO L78 Accepts]: Start accepts. Automaton has 23705 states and 60046 transitions. Word has length 59 [2021-06-05 13:51:09,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:09,650 INFO L482 AbstractCegarLoop]: Abstraction has 23705 states and 60046 transitions. [2021-06-05 13:51:09,650 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 13:51:09,650 INFO L276 IsEmpty]: Start isEmpty. Operand 23705 states and 60046 transitions. [2021-06-05 13:51:09,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:51:09,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:09,662 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 13:51:09,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1163 [2021-06-05 13:51:09,862 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:09,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:09,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1426088706, now seen corresponding path program 335 times [2021-06-05 13:51:09,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:09,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276361667] [2021-06-05 13:51:09,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:10,005 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 13:51:10,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:10,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276361667] [2021-06-05 13:51:10,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276361667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:10,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079091168] [2021-06-05 13:51:10,006 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 13:51:10,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 13:51:10,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:10,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:51:10,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:10,155 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 13:51:10,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079091168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:10,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:10,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 20 [2021-06-05 13:51:10,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228765312] [2021-06-05 13:51:10,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:51:10,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:10,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:51:10,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:51:10,156 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 13:51:10,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:10,679 INFO L93 Difference]: Finished difference Result 29277 states and 70528 transitions. [2021-06-05 13:51:10,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:51:10,679 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 13:51:10,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:10,712 INFO L225 Difference]: With dead ends: 29277 [2021-06-05 13:51:10,712 INFO L226 Difference]: Without dead ends: 29214 [2021-06-05 13:51:10,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 235.6ms TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:51:10,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29214 states. [2021-06-05 13:51:11,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29214 to 23705. [2021-06-05 13:51:11,029 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 13:51:11,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23705 states to 23705 states and 60043 transitions. [2021-06-05 13:51:11,073 INFO L78 Accepts]: Start accepts. Automaton has 23705 states and 60043 transitions. Word has length 59 [2021-06-05 13:51:11,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:11,073 INFO L482 AbstractCegarLoop]: Abstraction has 23705 states and 60043 transitions. [2021-06-05 13:51:11,073 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 13:51:11,073 INFO L276 IsEmpty]: Start isEmpty. Operand 23705 states and 60043 transitions. [2021-06-05 13:51:11,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:51:11,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:11,083 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 13:51:11,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1164,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:11,284 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:11,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:11,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2030174377, now seen corresponding path program 336 times [2021-06-05 13:51:11,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:11,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505910013] [2021-06-05 13:51:11,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:11,454 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 13:51:11,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:11,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505910013] [2021-06-05 13:51:11,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505910013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:11,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540385354] [2021-06-05 13:51:11,455 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 13:51:11,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 13:51:11,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:11,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:51:11,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:11,574 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 13:51:11,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540385354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:11,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:11,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-05 13:51:11,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912303035] [2021-06-05 13:51:11,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:51:11,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:11,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:51:11,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:51:11,574 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 13:51:12,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:12,527 INFO L93 Difference]: Finished difference Result 33949 states and 78972 transitions. [2021-06-05 13:51:12,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:51:12,527 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 13:51:12,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:12,568 INFO L225 Difference]: With dead ends: 33949 [2021-06-05 13:51:12,568 INFO L226 Difference]: Without dead ends: 30265 [2021-06-05 13:51:12,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 519.2ms TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:51:12,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30265 states. [2021-06-05 13:51:12,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30265 to 13219. [2021-06-05 13:51:12,790 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 13:51:12,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13219 states to 13219 states and 35153 transitions. [2021-06-05 13:51:12,811 INFO L78 Accepts]: Start accepts. Automaton has 13219 states and 35153 transitions. Word has length 59 [2021-06-05 13:51:12,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:12,811 INFO L482 AbstractCegarLoop]: Abstraction has 13219 states and 35153 transitions. [2021-06-05 13:51:12,811 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 13:51:12,811 INFO L276 IsEmpty]: Start isEmpty. Operand 13219 states and 35153 transitions. [2021-06-05 13:51:12,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:51:12,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:12,819 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 13:51:13,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1173,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:13,019 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:13,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:13,019 INFO L82 PathProgramCache]: Analyzing trace with hash 2026731402, now seen corresponding path program 161 times [2021-06-05 13:51:13,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:13,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852870923] [2021-06-05 13:51:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:13,098 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 13:51:13,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:13,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852870923] [2021-06-05 13:51:13,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852870923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:13,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370468692] [2021-06-05 13:51:13,098 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 13:51:13,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 13:51:13,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:13,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:51:13,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:13,274 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 13:51:13,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370468692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:13,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:13,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 20 [2021-06-05 13:51:13,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088044078] [2021-06-05 13:51:13,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:51:13,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:13,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:51:13,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:51:13,275 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 13:51:13,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:13,626 INFO L93 Difference]: Finished difference Result 15361 states and 39642 transitions. [2021-06-05 13:51:13,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:51:13,626 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 13:51:13,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:13,646 INFO L225 Difference]: With dead ends: 15361 [2021-06-05 13:51:13,646 INFO L226 Difference]: Without dead ends: 15347 [2021-06-05 13:51:13,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:51:13,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15347 states. [2021-06-05 13:51:13,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15347 to 13918. [2021-06-05 13:51:13,855 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 13:51:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13918 states to 13918 states and 36996 transitions. [2021-06-05 13:51:13,878 INFO L78 Accepts]: Start accepts. Automaton has 13918 states and 36996 transitions. Word has length 59 [2021-06-05 13:51:13,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:13,878 INFO L482 AbstractCegarLoop]: Abstraction has 13918 states and 36996 transitions. [2021-06-05 13:51:13,878 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 13:51:13,878 INFO L276 IsEmpty]: Start isEmpty. Operand 13918 states and 36996 transitions. [2021-06-05 13:51:13,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:51:13,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:13,886 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 13:51:14,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,548 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:14,087 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:14,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:14,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1404850992, now seen corresponding path program 162 times [2021-06-05 13:51:14,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:14,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767673836] [2021-06-05 13:51:14,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:14,167 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 13:51:14,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:14,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767673836] [2021-06-05 13:51:14,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767673836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:14,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392884724] [2021-06-05 13:51:14,168 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 13:51:14,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 13:51:14,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:14,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:51:14,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:14,292 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 13:51:14,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392884724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:14,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:14,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 13:51:14,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695347146] [2021-06-05 13:51:14,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:51:14,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:14,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:51:14,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:51:14,292 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 13:51:14,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:14,583 INFO L93 Difference]: Finished difference Result 16530 states and 42212 transitions. [2021-06-05 13:51:14,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:51:14,583 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 13:51:14,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:14,602 INFO L225 Difference]: With dead ends: 16530 [2021-06-05 13:51:14,602 INFO L226 Difference]: Without dead ends: 16530 [2021-06-05 13:51:14,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=172, Invalid=248, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:51:14,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16530 states. [2021-06-05 13:51:14,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16530 to 13921. [2021-06-05 13:51:14,815 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 13:51:14,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13921 states to 13921 states and 37005 transitions. [2021-06-05 13:51:14,836 INFO L78 Accepts]: Start accepts. Automaton has 13921 states and 37005 transitions. Word has length 59 [2021-06-05 13:51:14,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:14,836 INFO L482 AbstractCegarLoop]: Abstraction has 13921 states and 37005 transitions. [2021-06-05 13:51:14,836 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 13:51:14,836 INFO L276 IsEmpty]: Start isEmpty. Operand 13921 states and 37005 transitions. [2021-06-05 13:51:14,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:51:14,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:14,844 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 13:51:15,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1176,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:15,045 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:15,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:15,045 INFO L82 PathProgramCache]: Analyzing trace with hash -232721464, now seen corresponding path program 163 times [2021-06-05 13:51:15,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:15,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593194834] [2021-06-05 13:51:15,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:15,132 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 13:51:15,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:15,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593194834] [2021-06-05 13:51:15,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593194834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:15,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16725746] [2021-06-05 13:51:15,133 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 13:51:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:15,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:51:15,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:15,273 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 13:51:15,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16725746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:15,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:15,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-06-05 13:51:15,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556386674] [2021-06-05 13:51:15,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:15,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:15,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:15,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:15,274 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 13:51:15,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:15,851 INFO L93 Difference]: Finished difference Result 15683 states and 40328 transitions. [2021-06-05 13:51:15,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:51:15,852 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 13:51:15,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:15,872 INFO L225 Difference]: With dead ends: 15683 [2021-06-05 13:51:15,872 INFO L226 Difference]: Without dead ends: 15683 [2021-06-05 13:51:15,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 304.6ms TimeCoverageRelationStatistics Valid=412, Invalid=710, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:51:15,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15683 states. [2021-06-05 13:51:16,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15683 to 13639. [2021-06-05 13:51:16,073 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 13:51:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13639 states to 13639 states and 36315 transitions. [2021-06-05 13:51:16,096 INFO L78 Accepts]: Start accepts. Automaton has 13639 states and 36315 transitions. Word has length 59 [2021-06-05 13:51:16,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:16,096 INFO L482 AbstractCegarLoop]: Abstraction has 13639 states and 36315 transitions. [2021-06-05 13:51:16,097 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 13:51:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 13639 states and 36315 transitions. [2021-06-05 13:51:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 13:51:16,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:16,104 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 13:51:16,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1177 [2021-06-05 13:51:16,305 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:16,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:16,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1702913116, now seen corresponding path program 337 times [2021-06-05 13:51:16,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:16,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196430056] [2021-06-05 13:51:16,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:16,466 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 13:51:16,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:16,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196430056] [2021-06-05 13:51:16,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196430056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:16,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654862514] [2021-06-05 13:51:16,467 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 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 13:51:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:16,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:51:16,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:16,589 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 13:51:16,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654862514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:16,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:16,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 13:51:16,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593790424] [2021-06-05 13:51:16,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:51:16,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:16,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:51:16,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:51:16,590 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 13:51:16,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:16,940 INFO L93 Difference]: Finished difference Result 15972 states and 40554 transitions. [2021-06-05 13:51:16,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:51:16,941 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 13:51:16,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:16,959 INFO L225 Difference]: With dead ends: 15972 [2021-06-05 13:51:16,959 INFO L226 Difference]: Without dead ends: 15898 [2021-06-05 13:51:16,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:51:16,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15898 states. [2021-06-05 13:51:17,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15898 to 13648. [2021-06-05 13:51:17,136 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 13:51:17,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13648 states to 13648 states and 36329 transitions. [2021-06-05 13:51:17,158 INFO L78 Accepts]: Start accepts. Automaton has 13648 states and 36329 transitions. Word has length 59 [2021-06-05 13:51:17,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:17,158 INFO L482 AbstractCegarLoop]: Abstraction has 13648 states and 36329 transitions. [2021-06-05 13:51:17,158 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 13:51:17,158 INFO L276 IsEmpty]: Start isEmpty. Operand 13648 states and 36329 transitions. [2021-06-05 13:51:17,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 13:51:17,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:17,167 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 13:51:17,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1180,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:17,368 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:17,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:17,368 INFO L82 PathProgramCache]: Analyzing trace with hash -911313595, now seen corresponding path program 338 times [2021-06-05 13:51:17,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:17,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687212138] [2021-06-05 13:51:17,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:17,446 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 13:51:17,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:17,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687212138] [2021-06-05 13:51:17,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687212138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:17,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750383904] [2021-06-05 13:51:17,446 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 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 13:51:17,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:17,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:17,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:51:17,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:17,882 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 13:51:17,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750383904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:17,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:17,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19] total 28 [2021-06-05 13:51:17,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067139973] [2021-06-05 13:51:17,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 13:51:17,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:17,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 13:51:17,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:51:17,883 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 13:51:19,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:19,891 INFO L93 Difference]: Finished difference Result 17222 states and 43443 transitions. [2021-06-05 13:51:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 13:51:19,891 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 13:51:19,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:19,906 INFO L225 Difference]: With dead ends: 17222 [2021-06-05 13:51:19,906 INFO L226 Difference]: Without dead ends: 17184 [2021-06-05 13:51:19,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1055.1ms TimeCoverageRelationStatistics Valid=971, Invalid=4141, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 13:51:19,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17184 states. [2021-06-05 13:51:20,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17184 to 14862. [2021-06-05 13:51:20,071 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 13:51:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14862 states to 14862 states and 38979 transitions. [2021-06-05 13:51:20,094 INFO L78 Accepts]: Start accepts. Automaton has 14862 states and 38979 transitions. Word has length 62 [2021-06-05 13:51:20,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:20,094 INFO L482 AbstractCegarLoop]: Abstraction has 14862 states and 38979 transitions. [2021-06-05 13:51:20,094 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 13:51:20,095 INFO L276 IsEmpty]: Start isEmpty. Operand 14862 states and 38979 transitions. [2021-06-05 13:51:20,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 13:51:20,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:20,103 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 13:51:20,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1190 [2021-06-05 13:51:20,304 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:20,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:20,304 INFO L82 PathProgramCache]: Analyzing trace with hash 2125604839, now seen corresponding path program 339 times [2021-06-05 13:51:20,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:20,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355211520] [2021-06-05 13:51:20,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:20,381 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 13:51:20,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:20,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355211520] [2021-06-05 13:51:20,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355211520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:20,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441515731] [2021-06-05 13:51:20,381 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 13:51:20,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 13:51:20,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:20,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 13:51:20,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:20,496 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 13:51:20,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441515731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:20,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:20,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 13:51:20,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818776684] [2021-06-05 13:51:20,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:51:20,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:20,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:51:20,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:51:20,497 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 13:51:20,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:20,922 INFO L93 Difference]: Finished difference Result 16116 states and 41321 transitions. [2021-06-05 13:51:20,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:51:20,923 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 13:51:20,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:20,943 INFO L225 Difference]: With dead ends: 16116 [2021-06-05 13:51:20,943 INFO L226 Difference]: Without dead ends: 16081 [2021-06-05 13:51:20,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:51:20,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16081 states. [2021-06-05 13:51:21,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16081 to 14880. [2021-06-05 13:51:21,147 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 13:51:21,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14880 states to 14880 states and 39017 transitions. [2021-06-05 13:51:21,172 INFO L78 Accepts]: Start accepts. Automaton has 14880 states and 39017 transitions. Word has length 62 [2021-06-05 13:51:21,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:21,172 INFO L482 AbstractCegarLoop]: Abstraction has 14880 states and 39017 transitions. [2021-06-05 13:51:21,172 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 13:51:21,172 INFO L276 IsEmpty]: Start isEmpty. Operand 14880 states and 39017 transitions. [2021-06-05 13:51:21,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 13:51:21,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:21,182 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 13:51:21,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1191,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:21,382 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:21,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:21,382 INFO L82 PathProgramCache]: Analyzing trace with hash -845583229, now seen corresponding path program 340 times [2021-06-05 13:51:21,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:21,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567567639] [2021-06-05 13:51:21,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:21,460 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 13:51:21,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:21,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567567639] [2021-06-05 13:51:21,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567567639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:21,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216480249] [2021-06-05 13:51:21,461 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 13:51:21,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:51:21,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:21,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 13:51:21,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:21,572 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 13:51:21,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216480249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:21,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:21,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 13:51:21,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605320436] [2021-06-05 13:51:21,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:51:21,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:21,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:51:21,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:51:21,573 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 13:51:21,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:21,996 INFO L93 Difference]: Finished difference Result 16292 states and 41632 transitions. [2021-06-05 13:51:21,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:51:21,997 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 13:51:21,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:22,016 INFO L225 Difference]: With dead ends: 16292 [2021-06-05 13:51:22,016 INFO L226 Difference]: Without dead ends: 16254 [2021-06-05 13:51:22,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:51:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16254 states. [2021-06-05 13:51:22,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16254 to 14979. [2021-06-05 13:51:22,205 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 13:51:22,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14979 states to 14979 states and 39198 transitions. [2021-06-05 13:51:22,229 INFO L78 Accepts]: Start accepts. Automaton has 14979 states and 39198 transitions. Word has length 62 [2021-06-05 13:51:22,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:22,229 INFO L482 AbstractCegarLoop]: Abstraction has 14979 states and 39198 transitions. [2021-06-05 13:51:22,229 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 13:51:22,229 INFO L276 IsEmpty]: Start isEmpty. Operand 14979 states and 39198 transitions. [2021-06-05 13:51:22,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 13:51:22,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:22,238 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 13:51:22,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1192,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:22,439 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:22,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:22,439 INFO L82 PathProgramCache]: Analyzing trace with hash -528313753, now seen corresponding path program 341 times [2021-06-05 13:51:22,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:22,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515910291] [2021-06-05 13:51:22,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:22,517 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 13:51:22,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:22,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515910291] [2021-06-05 13:51:22,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515910291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:22,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436750199] [2021-06-05 13:51:22,518 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 13:51:22,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 13:51:22,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:22,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 13:51:22,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:22,635 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 13:51:22,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436750199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:22,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:22,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 13:51:22,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039492771] [2021-06-05 13:51:22,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:51:22,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:22,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:51:22,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:51:22,636 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 13:51:23,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:23,060 INFO L93 Difference]: Finished difference Result 16320 states and 41716 transitions. [2021-06-05 13:51:23,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:51:23,060 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 13:51:23,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:23,078 INFO L225 Difference]: With dead ends: 16320 [2021-06-05 13:51:23,079 INFO L226 Difference]: Without dead ends: 16260 [2021-06-05 13:51:23,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:51:23,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16260 states. [2021-06-05 13:51:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16260 to 15051. [2021-06-05 13:51:23,257 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 13:51:23,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15051 states to 15051 states and 39332 transitions. [2021-06-05 13:51:23,280 INFO L78 Accepts]: Start accepts. Automaton has 15051 states and 39332 transitions. Word has length 62 [2021-06-05 13:51:23,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:23,280 INFO L482 AbstractCegarLoop]: Abstraction has 15051 states and 39332 transitions. [2021-06-05 13:51:23,280 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 13:51:23,280 INFO L276 IsEmpty]: Start isEmpty. Operand 15051 states and 39332 transitions. [2021-06-05 13:51:23,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 13:51:23,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:23,289 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 13:51:23,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1193,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:23,490 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:23,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:23,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1976372733, now seen corresponding path program 342 times [2021-06-05 13:51:23,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:23,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118663510] [2021-06-05 13:51:23,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:23,581 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 13:51:23,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:23,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118663510] [2021-06-05 13:51:23,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118663510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:23,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931815475] [2021-06-05 13:51:23,581 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 13:51:23,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 13:51:23,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:23,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:51:23,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:23,843 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 13:51:23,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931815475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:23,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:23,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 13:51:23,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50515471] [2021-06-05 13:51:23,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:51:23,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:23,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:51:23,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:51:23,844 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 13:51:25,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:25,087 INFO L93 Difference]: Finished difference Result 22065 states and 52580 transitions. [2021-06-05 13:51:25,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 13:51:25,087 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 13:51:25,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:25,112 INFO L225 Difference]: With dead ends: 22065 [2021-06-05 13:51:25,112 INFO L226 Difference]: Without dead ends: 21976 [2021-06-05 13:51:25,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 565.7ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 13:51:25,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21976 states. [2021-06-05 13:51:25,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21976 to 15162. [2021-06-05 13:51:25,334 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 13:51:25,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15162 states to 15162 states and 39546 transitions. [2021-06-05 13:51:25,359 INFO L78 Accepts]: Start accepts. Automaton has 15162 states and 39546 transitions. Word has length 62 [2021-06-05 13:51:25,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:25,359 INFO L482 AbstractCegarLoop]: Abstraction has 15162 states and 39546 transitions. [2021-06-05 13:51:25,359 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 13:51:25,359 INFO L276 IsEmpty]: Start isEmpty. Operand 15162 states and 39546 transitions. [2021-06-05 13:51:25,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 13:51:25,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:25,368 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 13:51:25,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:25,569 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:25,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:25,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1845042407, now seen corresponding path program 343 times [2021-06-05 13:51:25,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:25,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878182868] [2021-06-05 13:51:25,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:25,662 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 13:51:25,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:25,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878182868] [2021-06-05 13:51:25,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878182868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:25,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638995691] [2021-06-05 13:51:25,663 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 13:51:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:25,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 13:51:25,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:25,777 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 13:51:25,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638995691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:25,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:25,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 13:51:25,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213940272] [2021-06-05 13:51:25,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:51:25,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:25,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:51:25,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:51:25,778 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 13:51:26,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:26,226 INFO L93 Difference]: Finished difference Result 16450 states and 42034 transitions. [2021-06-05 13:51:26,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:51:26,226 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 13:51:26,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:26,246 INFO L225 Difference]: With dead ends: 16450 [2021-06-05 13:51:26,246 INFO L226 Difference]: Without dead ends: 16412 [2021-06-05 13:51:26,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:51:26,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16412 states. [2021-06-05 13:51:26,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16412 to 15288. [2021-06-05 13:51:26,445 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 13:51:26,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15288 states to 15288 states and 39782 transitions. [2021-06-05 13:51:26,470 INFO L78 Accepts]: Start accepts. Automaton has 15288 states and 39782 transitions. Word has length 62 [2021-06-05 13:51:26,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:26,471 INFO L482 AbstractCegarLoop]: Abstraction has 15288 states and 39782 transitions. [2021-06-05 13:51:26,471 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 13:51:26,471 INFO L276 IsEmpty]: Start isEmpty. Operand 15288 states and 39782 transitions. [2021-06-05 13:51:26,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 13:51:26,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:26,481 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 13:51:26,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1195,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:26,681 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:26,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:26,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1074636925, now seen corresponding path program 344 times [2021-06-05 13:51:26,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:26,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171774395] [2021-06-05 13:51:26,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:26,759 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 13:51:26,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:26,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171774395] [2021-06-05 13:51:26,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171774395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:26,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791658577] [2021-06-05 13:51:26,759 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 13:51:26,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:26,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:26,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:51:26,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:27,014 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 13:51:27,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791658577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:27,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:27,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 13:51:27,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410448835] [2021-06-05 13:51:27,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:51:27,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:27,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:51:27,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:51:27,015 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 13:51:28,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:28,286 INFO L93 Difference]: Finished difference Result 22675 states and 53617 transitions. [2021-06-05 13:51:28,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 13:51:28,286 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 13:51:28,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:28,313 INFO L225 Difference]: With dead ends: 22675 [2021-06-05 13:51:28,313 INFO L226 Difference]: Without dead ends: 22612 [2021-06-05 13:51:28,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 533.8ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 13:51:28,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22612 states. [2021-06-05 13:51:28,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22612 to 15453. [2021-06-05 13:51:28,540 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 13:51:28,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15453 states to 15453 states and 40104 transitions. [2021-06-05 13:51:28,564 INFO L78 Accepts]: Start accepts. Automaton has 15453 states and 40104 transitions. Word has length 62 [2021-06-05 13:51:28,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:28,564 INFO L482 AbstractCegarLoop]: Abstraction has 15453 states and 40104 transitions. [2021-06-05 13:51:28,564 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 13:51:28,564 INFO L276 IsEmpty]: Start isEmpty. Operand 15453 states and 40104 transitions. [2021-06-05 13:51:28,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 13:51:28,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:28,574 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 13:51:28,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1196,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:28,775 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:28,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:28,775 INFO L82 PathProgramCache]: Analyzing trace with hash 436062055, now seen corresponding path program 345 times [2021-06-05 13:51:28,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:28,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117777692] [2021-06-05 13:51:28,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:28,928 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 13:51:28,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:28,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117777692] [2021-06-05 13:51:28,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117777692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:28,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595673576] [2021-06-05 13:51:28,929 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 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 13:51:28,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 13:51:28,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:28,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:51:28,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:29,194 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 13:51:29,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595673576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:29,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:29,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 13:51:29,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529324959] [2021-06-05 13:51:29,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:51:29,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:29,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:51:29,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:51:29,195 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 13:51:30,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:30,489 INFO L93 Difference]: Finished difference Result 23187 states and 55034 transitions. [2021-06-05 13:51:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 13:51:30,489 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 13:51:30,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:30,516 INFO L225 Difference]: With dead ends: 23187 [2021-06-05 13:51:30,517 INFO L226 Difference]: Without dead ends: 23122 [2021-06-05 13:51:30,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 617.3ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 13:51:30,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23122 states. [2021-06-05 13:51:30,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23122 to 16198. [2021-06-05 13:51:30,755 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 13:51:30,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16198 states to 16198 states and 42091 transitions. [2021-06-05 13:51:30,780 INFO L78 Accepts]: Start accepts. Automaton has 16198 states and 42091 transitions. Word has length 62 [2021-06-05 13:51:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:30,780 INFO L482 AbstractCegarLoop]: Abstraction has 16198 states and 42091 transitions. [2021-06-05 13:51:30,780 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 13:51:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 16198 states and 42091 transitions. [2021-06-05 13:51:30,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 13:51:30,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:30,790 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 13:51:30,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1197,559 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:30,991 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:30,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:30,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1292919549, now seen corresponding path program 346 times [2021-06-05 13:51:30,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:30,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773188647] [2021-06-05 13:51:30,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:31,070 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 13:51:31,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:31,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773188647] [2021-06-05 13:51:31,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773188647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:31,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579775161] [2021-06-05 13:51:31,070 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 13:51:31,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:51:31,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:31,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 13:51:31,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:31,181 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 13:51:31,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579775161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:31,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:31,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 13:51:31,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380648095] [2021-06-05 13:51:31,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:51:31,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:31,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:51:31,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:51:31,182 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 13:51:31,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:31,604 INFO L93 Difference]: Finished difference Result 18245 states and 46468 transitions. [2021-06-05 13:51:31,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:51:31,605 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 13:51:31,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:31,628 INFO L225 Difference]: With dead ends: 18245 [2021-06-05 13:51:31,628 INFO L226 Difference]: Without dead ends: 18220 [2021-06-05 13:51:31,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:51:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18220 states. [2021-06-05 13:51:31,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18220 to 16907. [2021-06-05 13:51:31,833 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 13:51:31,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16907 states to 16907 states and 43863 transitions. [2021-06-05 13:51:31,859 INFO L78 Accepts]: Start accepts. Automaton has 16907 states and 43863 transitions. Word has length 62 [2021-06-05 13:51:31,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:31,859 INFO L482 AbstractCegarLoop]: Abstraction has 16907 states and 43863 transitions. [2021-06-05 13:51:31,859 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 13:51:31,859 INFO L276 IsEmpty]: Start isEmpty. Operand 16907 states and 43863 transitions. [2021-06-05 13:51:31,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:51:31,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:31,870 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 13:51:32,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1198 [2021-06-05 13:51:32,071 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:32,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:32,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1959224392, now seen corresponding path program 164 times [2021-06-05 13:51:32,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:32,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036843729] [2021-06-05 13:51:32,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:32,293 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 13:51:32,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:32,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036843729] [2021-06-05 13:51:32,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036843729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:32,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593621695] [2021-06-05 13:51:32,293 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 13:51:32,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:32,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:32,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:51:32,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:33,480 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 13:51:33,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593621695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:33,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:33,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2021-06-05 13:51:33,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794539919] [2021-06-05 13:51:33,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 13:51:33,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:33,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 13:51:33,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 13:51:33,482 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 13:51:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:56,560 INFO L93 Difference]: Finished difference Result 40647 states and 93712 transitions. [2021-06-05 13:51:56,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 408 states. [2021-06-05 13:51:56,560 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 13:51:56,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:56,605 INFO L225 Difference]: With dead ends: 40647 [2021-06-05 13:51:56,605 INFO L226 Difference]: Without dead ends: 39783 [2021-06-05 13:51:56,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 433 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80537 ImplicationChecksByTransitivity, 20425.0ms TimeCoverageRelationStatistics Valid=22109, Invalid=166681, Unknown=0, NotChecked=0, Total=188790 [2021-06-05 13:51:56,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39783 states. [2021-06-05 13:51:57,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39783 to 20292. [2021-06-05 13:51:57,029 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 13:51:57,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20292 states to 20292 states and 53508 transitions. [2021-06-05 13:51:57,063 INFO L78 Accepts]: Start accepts. Automaton has 20292 states and 53508 transitions. Word has length 65 [2021-06-05 13:51:57,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:57,063 INFO L482 AbstractCegarLoop]: Abstraction has 20292 states and 53508 transitions. [2021-06-05 13:51:57,063 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 13:51:57,063 INFO L276 IsEmpty]: Start isEmpty. Operand 20292 states and 53508 transitions. [2021-06-05 13:51:57,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:51:57,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:57,079 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 13:51:57,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1199 [2021-06-05 13:51:57,279 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:57,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:57,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1290275768, now seen corresponding path program 347 times [2021-06-05 13:51:57,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:57,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159949637] [2021-06-05 13:51:57,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:57,506 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 13:51:57,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:57,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159949637] [2021-06-05 13:51:57,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159949637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:57,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037508849] [2021-06-05 13:51:57,506 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 13:51:57,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 13:51:57,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:57,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:51:57,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:57,931 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 13:51:57,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037508849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:57,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:57,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-06-05 13:51:57,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130213262] [2021-06-05 13:51:57,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 13:51:57,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:57,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 13:51:57,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:51:57,932 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 13:51:59,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:59,400 INFO L93 Difference]: Finished difference Result 20618 states and 54021 transitions. [2021-06-05 13:51:59,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:51:59,400 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 13:51:59,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:59,425 INFO L225 Difference]: With dead ends: 20618 [2021-06-05 13:51:59,426 INFO L226 Difference]: Without dead ends: 20502 [2021-06-05 13:51:59,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 439.8ms TimeCoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:51:59,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20502 states. [2021-06-05 13:51:59,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20502 to 20276. [2021-06-05 13:51:59,689 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 13:51:59,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20276 states to 20276 states and 53443 transitions. [2021-06-05 13:51:59,721 INFO L78 Accepts]: Start accepts. Automaton has 20276 states and 53443 transitions. Word has length 65 [2021-06-05 13:51:59,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:59,721 INFO L482 AbstractCegarLoop]: Abstraction has 20276 states and 53443 transitions. [2021-06-05 13:51:59,721 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 13:51:59,721 INFO L276 IsEmpty]: Start isEmpty. Operand 20276 states and 53443 transitions. [2021-06-05 13:51:59,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:51:59,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:59,735 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 13:51:59,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1212 [2021-06-05 13:51:59,936 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:59,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:59,936 INFO L82 PathProgramCache]: Analyzing trace with hash 708589307, now seen corresponding path program 165 times [2021-06-05 13:51:59,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:59,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325861076] [2021-06-05 13:51:59,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:00,029 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 13:52:00,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:00,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325861076] [2021-06-05 13:52:00,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325861076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:00,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043927722] [2021-06-05 13:52:00,030 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 13:52:00,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 13:52:00,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:00,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:00,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:00,167 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 13:52:00,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043927722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:00,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:00,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:52:00,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460928787] [2021-06-05 13:52:00,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:52:00,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:00,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:52:00,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:52:00,168 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 13:52:00,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:00,383 INFO L93 Difference]: Finished difference Result 27245 states and 66968 transitions. [2021-06-05 13:52:00,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:52:00,383 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 13:52:00,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:00,415 INFO L225 Difference]: With dead ends: 27245 [2021-06-05 13:52:00,416 INFO L226 Difference]: Without dead ends: 27235 [2021-06-05 13:52:00,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:00,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27235 states. [2021-06-05 13:52:00,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27235 to 20359. [2021-06-05 13:52:00,690 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 13:52:00,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20359 states to 20359 states and 53711 transitions. [2021-06-05 13:52:00,723 INFO L78 Accepts]: Start accepts. Automaton has 20359 states and 53711 transitions. Word has length 65 [2021-06-05 13:52:00,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:00,723 INFO L482 AbstractCegarLoop]: Abstraction has 20359 states and 53711 transitions. [2021-06-05 13:52:00,723 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 13:52:00,723 INFO L276 IsEmpty]: Start isEmpty. Operand 20359 states and 53711 transitions. [2021-06-05 13:52:00,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:00,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:00,739 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 13:52:00,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1213 [2021-06-05 13:52:00,939 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:00,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:00,940 INFO L82 PathProgramCache]: Analyzing trace with hash -248603333, now seen corresponding path program 166 times [2021-06-05 13:52:00,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:00,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286772809] [2021-06-05 13:52:00,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:01,027 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 13:52:01,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:01,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286772809] [2021-06-05 13:52:01,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286772809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:01,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314189724] [2021-06-05 13:52:01,027 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 13:52:01,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:01,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:01,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:01,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:01,164 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 13:52:01,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314189724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:01,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:01,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:52:01,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99234005] [2021-06-05 13:52:01,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:52:01,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:01,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:52:01,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:52:01,165 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 13:52:01,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:01,452 INFO L93 Difference]: Finished difference Result 30078 states and 74504 transitions. [2021-06-05 13:52:01,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:52:01,453 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 13:52:01,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:01,490 INFO L225 Difference]: With dead ends: 30078 [2021-06-05 13:52:01,490 INFO L226 Difference]: Without dead ends: 30078 [2021-06-05 13:52:01,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:01,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30078 states. [2021-06-05 13:52:01,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30078 to 22013. [2021-06-05 13:52:01,812 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 13:52:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22013 states to 22013 states and 58759 transitions. [2021-06-05 13:52:01,848 INFO L78 Accepts]: Start accepts. Automaton has 22013 states and 58759 transitions. Word has length 65 [2021-06-05 13:52:01,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:01,848 INFO L482 AbstractCegarLoop]: Abstraction has 22013 states and 58759 transitions. [2021-06-05 13:52:01,848 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 13:52:01,848 INFO L276 IsEmpty]: Start isEmpty. Operand 22013 states and 58759 transitions. [2021-06-05 13:52:01,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:01,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:01,863 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 13:52:02,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1216 [2021-06-05 13:52:02,064 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:02,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:02,064 INFO L82 PathProgramCache]: Analyzing trace with hash -782468709, now seen corresponding path program 348 times [2021-06-05 13:52:02,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:02,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551700073] [2021-06-05 13:52:02,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:02,154 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 13:52:02,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:02,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551700073] [2021-06-05 13:52:02,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551700073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:02,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810738772] [2021-06-05 13:52:02,155 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 13:52:02,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 13:52:02,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:02,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:02,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:02,285 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 13:52:02,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810738772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:02,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:02,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:52:02,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108807551] [2021-06-05 13:52:02,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:52:02,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:02,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:52:02,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:52:02,285 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 13:52:02,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:02,572 INFO L93 Difference]: Finished difference Result 23642 states and 61469 transitions. [2021-06-05 13:52:02,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:02,573 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 13:52:02,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:02,599 INFO L225 Difference]: With dead ends: 23642 [2021-06-05 13:52:02,599 INFO L226 Difference]: Without dead ends: 23636 [2021-06-05 13:52:02,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:52:02,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23636 states. [2021-06-05 13:52:02,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23636 to 21888. [2021-06-05 13:52:02,877 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 13:52:02,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21888 states to 21888 states and 58372 transitions. [2021-06-05 13:52:02,914 INFO L78 Accepts]: Start accepts. Automaton has 21888 states and 58372 transitions. Word has length 65 [2021-06-05 13:52:02,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:02,914 INFO L482 AbstractCegarLoop]: Abstraction has 21888 states and 58372 transitions. [2021-06-05 13:52:02,914 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 13:52:02,914 INFO L276 IsEmpty]: Start isEmpty. Operand 21888 states and 58372 transitions. [2021-06-05 13:52:02,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:02,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:02,929 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 13:52:03,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1217,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:03,130 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:03,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:03,130 INFO L82 PathProgramCache]: Analyzing trace with hash 855335590, now seen corresponding path program 167 times [2021-06-05 13:52:03,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:03,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453523204] [2021-06-05 13:52:03,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:03,256 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 13:52:03,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:03,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453523204] [2021-06-05 13:52:03,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453523204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:03,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010302727] [2021-06-05 13:52:03,256 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 13:52:03,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 13:52:03,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:03,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:52:03,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:03,389 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 13:52:03,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010302727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:03,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:03,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:52:03,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851490854] [2021-06-05 13:52:03,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:52:03,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:03,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:52:03,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:52:03,390 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 13:52:04,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:04,055 INFO L93 Difference]: Finished difference Result 24640 states and 63599 transitions. [2021-06-05 13:52:04,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:52:04,055 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 13:52:04,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:04,085 INFO L225 Difference]: With dead ends: 24640 [2021-06-05 13:52:04,086 INFO L226 Difference]: Without dead ends: 24581 [2021-06-05 13:52:04,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:52:04,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24581 states. [2021-06-05 13:52:04,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24581 to 22019. [2021-06-05 13:52:04,398 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 13:52:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22019 states to 22019 states and 58704 transitions. [2021-06-05 13:52:04,437 INFO L78 Accepts]: Start accepts. Automaton has 22019 states and 58704 transitions. Word has length 65 [2021-06-05 13:52:04,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:04,437 INFO L482 AbstractCegarLoop]: Abstraction has 22019 states and 58704 transitions. [2021-06-05 13:52:04,437 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 13:52:04,437 INFO L276 IsEmpty]: Start isEmpty. Operand 22019 states and 58704 transitions. [2021-06-05 13:52:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:04,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:04,453 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 13:52:04,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1220 [2021-06-05 13:52:04,654 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:04,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:04,654 INFO L82 PathProgramCache]: Analyzing trace with hash -698361267, now seen corresponding path program 349 times [2021-06-05 13:52:04,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:04,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226538414] [2021-06-05 13:52:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:04,733 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 13:52:04,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:04,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226538414] [2021-06-05 13:52:04,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226538414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:04,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155937985] [2021-06-05 13:52:04,733 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 13:52:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:04,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:04,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:04,956 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 13:52:04,972 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 13:52:04,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155937985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:04,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:04,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:52:04,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252790946] [2021-06-05 13:52:04,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:52:04,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:04,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:52:04,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:52:04,973 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 13:52:05,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:05,204 INFO L93 Difference]: Finished difference Result 25003 states and 63786 transitions. [2021-06-05 13:52:05,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:05,204 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 13:52:05,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:05,238 INFO L225 Difference]: With dead ends: 25003 [2021-06-05 13:52:05,238 INFO L226 Difference]: Without dead ends: 25000 [2021-06-05 13:52:05,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:52:05,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25000 states. [2021-06-05 13:52:05,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25000 to 21981. [2021-06-05 13:52:05,565 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 13:52:05,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21981 states to 21981 states and 58569 transitions. [2021-06-05 13:52:05,604 INFO L78 Accepts]: Start accepts. Automaton has 21981 states and 58569 transitions. Word has length 65 [2021-06-05 13:52:05,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:05,605 INFO L482 AbstractCegarLoop]: Abstraction has 21981 states and 58569 transitions. [2021-06-05 13:52:05,605 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 13:52:05,605 INFO L276 IsEmpty]: Start isEmpty. Operand 21981 states and 58569 transitions. [2021-06-05 13:52:05,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:05,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:05,621 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 13:52:05,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 567 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1221 [2021-06-05 13:52:05,821 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:05,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:05,821 INFO L82 PathProgramCache]: Analyzing trace with hash -491298701, now seen corresponding path program 350 times [2021-06-05 13:52:05,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:05,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513134223] [2021-06-05 13:52:05,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:05,908 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 13:52:05,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:05,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513134223] [2021-06-05 13:52:05,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513134223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:05,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205688322] [2021-06-05 13:52:05,908 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 13:52:05,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:05,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:05,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:05,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:06,042 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 13:52:06,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205688322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:06,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:06,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:52:06,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501648277] [2021-06-05 13:52:06,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:52:06,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:06,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:52:06,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:52:06,045 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 13:52:06,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:06,353 INFO L93 Difference]: Finished difference Result 24995 states and 63690 transitions. [2021-06-05 13:52:06,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:52:06,354 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 13:52:06,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:06,386 INFO L225 Difference]: With dead ends: 24995 [2021-06-05 13:52:06,386 INFO L226 Difference]: Without dead ends: 24977 [2021-06-05 13:52:06,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24977 states. [2021-06-05 13:52:06,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24977 to 21595. [2021-06-05 13:52:06,682 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 13:52:06,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21595 states to 21595 states and 57415 transitions. [2021-06-05 13:52:06,720 INFO L78 Accepts]: Start accepts. Automaton has 21595 states and 57415 transitions. Word has length 65 [2021-06-05 13:52:06,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:06,720 INFO L482 AbstractCegarLoop]: Abstraction has 21595 states and 57415 transitions. [2021-06-05 13:52:06,720 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 13:52:06,720 INFO L276 IsEmpty]: Start isEmpty. Operand 21595 states and 57415 transitions. [2021-06-05 13:52:06,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:06,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:06,737 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 13:52:06,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1223 [2021-06-05 13:52:06,937 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:06,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:06,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1939298714, now seen corresponding path program 351 times [2021-06-05 13:52:06,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:06,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058189405] [2021-06-05 13:52:06,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:07,043 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 13:52:07,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:07,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058189405] [2021-06-05 13:52:07,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058189405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:07,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023701907] [2021-06-05 13:52:07,043 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 13:52:07,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 13:52:07,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:07,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:52:07,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:07,189 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 13:52:07,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023701907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:07,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:07,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:52:07,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786738455] [2021-06-05 13:52:07,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:52:07,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:07,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:52:07,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:52:07,190 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 13:52:08,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:08,075 INFO L93 Difference]: Finished difference Result 23174 states and 60158 transitions. [2021-06-05 13:52:08,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:52:08,075 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 13:52:08,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:08,104 INFO L225 Difference]: With dead ends: 23174 [2021-06-05 13:52:08,104 INFO L226 Difference]: Without dead ends: 23136 [2021-06-05 13:52:08,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 180.3ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:52:08,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23136 states. [2021-06-05 13:52:08,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23136 to 21566. [2021-06-05 13:52:08,386 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 13:52:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21566 states to 21566 states and 57332 transitions. [2021-06-05 13:52:08,424 INFO L78 Accepts]: Start accepts. Automaton has 21566 states and 57332 transitions. Word has length 65 [2021-06-05 13:52:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:08,424 INFO L482 AbstractCegarLoop]: Abstraction has 21566 states and 57332 transitions. [2021-06-05 13:52:08,424 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 13:52:08,424 INFO L276 IsEmpty]: Start isEmpty. Operand 21566 states and 57332 transitions. [2021-06-05 13:52:08,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:08,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:08,440 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 13:52:08,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1226 [2021-06-05 13:52:08,640 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:08,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:08,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1742132402, now seen corresponding path program 352 times [2021-06-05 13:52:08,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:08,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621417584] [2021-06-05 13:52:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:08,782 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 13:52:08,877 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 13:52:08,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:08,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621417584] [2021-06-05 13:52:08,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621417584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:08,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305199945] [2021-06-05 13:52:08,877 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 13:52:08,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:08,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:08,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:52:08,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:09,008 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 13:52:09,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305199945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:09,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:09,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:52:09,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743761875] [2021-06-05 13:52:09,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:52:09,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:09,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:52:09,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:52:09,009 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 13:52:09,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:09,713 INFO L93 Difference]: Finished difference Result 23637 states and 61214 transitions. [2021-06-05 13:52:09,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:52:09,713 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 13:52:09,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:09,742 INFO L225 Difference]: With dead ends: 23637 [2021-06-05 13:52:09,742 INFO L226 Difference]: Without dead ends: 23625 [2021-06-05 13:52:09,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:52:09,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23625 states. [2021-06-05 13:52:10,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23625 to 21570. [2021-06-05 13:52:10,037 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 13:52:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21570 states to 21570 states and 57337 transitions. [2021-06-05 13:52:10,073 INFO L78 Accepts]: Start accepts. Automaton has 21570 states and 57337 transitions. Word has length 65 [2021-06-05 13:52:10,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:10,073 INFO L482 AbstractCegarLoop]: Abstraction has 21570 states and 57337 transitions. [2021-06-05 13:52:10,073 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 13:52:10,073 INFO L276 IsEmpty]: Start isEmpty. Operand 21570 states and 57337 transitions. [2021-06-05 13:52:10,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:10,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:10,088 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 13:52:10,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1227,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:10,289 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:10,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:10,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1584832915, now seen corresponding path program 168 times [2021-06-05 13:52:10,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:10,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198580575] [2021-06-05 13:52:10,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:10,380 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 13:52:10,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:10,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198580575] [2021-06-05 13:52:10,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198580575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:10,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370095605] [2021-06-05 13:52:10,381 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 13:52:10,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 13:52:10,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:10,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:10,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:10,541 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 13:52:10,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370095605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:10,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:10,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 16 [2021-06-05 13:52:10,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725817872] [2021-06-05 13:52:10,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:52:10,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:10,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:52:10,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:52:10,542 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 13:52:10,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:10,840 INFO L93 Difference]: Finished difference Result 28789 states and 71294 transitions. [2021-06-05 13:52:10,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:52:10,840 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 13:52:10,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:10,875 INFO L225 Difference]: With dead ends: 28789 [2021-06-05 13:52:10,876 INFO L226 Difference]: Without dead ends: 28769 [2021-06-05 13:52:10,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:52:10,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28769 states. [2021-06-05 13:52:11,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28769 to 21641. [2021-06-05 13:52:11,195 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 13:52:11,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21641 states to 21641 states and 57575 transitions. [2021-06-05 13:52:11,231 INFO L78 Accepts]: Start accepts. Automaton has 21641 states and 57575 transitions. Word has length 65 [2021-06-05 13:52:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:11,231 INFO L482 AbstractCegarLoop]: Abstraction has 21641 states and 57575 transitions. [2021-06-05 13:52:11,232 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 13:52:11,232 INFO L276 IsEmpty]: Start isEmpty. Operand 21641 states and 57575 transitions. [2021-06-05 13:52:11,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:11,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:11,247 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 13:52:11,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1228 [2021-06-05 13:52:11,448 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:11,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:11,448 INFO L82 PathProgramCache]: Analyzing trace with hash -410917560, now seen corresponding path program 353 times [2021-06-05 13:52:11,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:11,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845816020] [2021-06-05 13:52:11,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:11,555 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 13:52:11,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:11,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845816020] [2021-06-05 13:52:11,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845816020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:11,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170594287] [2021-06-05 13:52:11,556 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 13:52:11,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 13:52:11,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:11,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:52:11,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:11,690 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 13:52:11,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170594287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:11,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:11,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:52:11,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248454212] [2021-06-05 13:52:11,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:52:11,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:11,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:52:11,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:52:11,691 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 13:52:12,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:12,546 INFO L93 Difference]: Finished difference Result 24593 states and 63329 transitions. [2021-06-05 13:52:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:52:12,546 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 13:52:12,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:12,575 INFO L225 Difference]: With dead ends: 24593 [2021-06-05 13:52:12,575 INFO L226 Difference]: Without dead ends: 24581 [2021-06-05 13:52:12,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:52:12,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24581 states. [2021-06-05 13:52:12,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24581 to 21673. [2021-06-05 13:52:12,907 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 13:52:12,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21673 states to 21673 states and 57651 transitions. [2021-06-05 13:52:12,942 INFO L78 Accepts]: Start accepts. Automaton has 21673 states and 57651 transitions. Word has length 65 [2021-06-05 13:52:12,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:12,942 INFO L482 AbstractCegarLoop]: Abstraction has 21673 states and 57651 transitions. [2021-06-05 13:52:12,942 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 13:52:12,942 INFO L276 IsEmpty]: Start isEmpty. Operand 21673 states and 57651 transitions. [2021-06-05 13:52:12,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:12,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:12,957 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 13:52:13,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1231 [2021-06-05 13:52:13,158 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:13,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:13,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1270859487, now seen corresponding path program 169 times [2021-06-05 13:52:13,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:13,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266428857] [2021-06-05 13:52:13,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:13,249 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 13:52:13,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:13,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266428857] [2021-06-05 13:52:13,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266428857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:13,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368059129] [2021-06-05 13:52:13,250 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 13:52:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:13,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:13,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:13,385 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 13:52:13,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368059129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:13,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:13,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:52:13,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239229199] [2021-06-05 13:52:13,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:52:13,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:13,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:52:13,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:52:13,385 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 13:52:13,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:13,695 INFO L93 Difference]: Finished difference Result 31661 states and 78137 transitions. [2021-06-05 13:52:13,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:52:13,696 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 13:52:13,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:13,737 INFO L225 Difference]: With dead ends: 31661 [2021-06-05 13:52:13,737 INFO L226 Difference]: Without dead ends: 31661 [2021-06-05 13:52:13,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:13,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31661 states. [2021-06-05 13:52:14,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31661 to 21919. [2021-06-05 13:52:14,087 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 13:52:14,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21919 states to 21919 states and 58423 transitions. [2021-06-05 13:52:14,125 INFO L78 Accepts]: Start accepts. Automaton has 21919 states and 58423 transitions. Word has length 65 [2021-06-05 13:52:14,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:14,126 INFO L482 AbstractCegarLoop]: Abstraction has 21919 states and 58423 transitions. [2021-06-05 13:52:14,126 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 13:52:14,126 INFO L276 IsEmpty]: Start isEmpty. Operand 21919 states and 58423 transitions. [2021-06-05 13:52:14,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:14,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:14,143 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 13:52:14,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1232,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:14,343 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:14,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:14,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1386535353, now seen corresponding path program 170 times [2021-06-05 13:52:14,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:14,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53482048] [2021-06-05 13:52:14,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:14,435 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 13:52:14,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:14,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53482048] [2021-06-05 13:52:14,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53482048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:14,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821620434] [2021-06-05 13:52:14,436 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 13:52:14,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:14,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:14,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:14,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:14,572 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 13:52:14,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821620434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:14,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:14,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 13:52:14,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425580182] [2021-06-05 13:52:14,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:52:14,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:14,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:52:14,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:14,573 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 13:52:14,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:14,896 INFO L93 Difference]: Finished difference Result 29555 states and 73447 transitions. [2021-06-05 13:52:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:52:14,896 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 13:52:14,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:14,936 INFO L225 Difference]: With dead ends: 29555 [2021-06-05 13:52:14,936 INFO L226 Difference]: Without dead ends: 29555 [2021-06-05 13:52:14,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=121, Invalid=185, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:52:14,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29555 states. [2021-06-05 13:52:15,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29555 to 21626. [2021-06-05 13:52:15,284 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 13:52:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21626 states to 21626 states and 57545 transitions. [2021-06-05 13:52:15,322 INFO L78 Accepts]: Start accepts. Automaton has 21626 states and 57545 transitions. Word has length 65 [2021-06-05 13:52:15,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:15,322 INFO L482 AbstractCegarLoop]: Abstraction has 21626 states and 57545 transitions. [2021-06-05 13:52:15,322 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 13:52:15,322 INFO L276 IsEmpty]: Start isEmpty. Operand 21626 states and 57545 transitions. [2021-06-05 13:52:15,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:15,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:15,338 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 13:52:15,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1233 [2021-06-05 13:52:15,538 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:15,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:15,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1121641549, now seen corresponding path program 354 times [2021-06-05 13:52:15,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:15,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082405277] [2021-06-05 13:52:15,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:15,633 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 13:52:15,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:15,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082405277] [2021-06-05 13:52:15,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082405277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:15,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499490889] [2021-06-05 13:52:15,634 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 13:52:15,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 13:52:15,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:15,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:15,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:15,765 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 13:52:15,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499490889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:15,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:15,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 13:52:15,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560771047] [2021-06-05 13:52:15,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:52:15,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:15,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:52:15,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:52:15,766 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 13:52:16,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:16,036 INFO L93 Difference]: Finished difference Result 24366 states and 62196 transitions. [2021-06-05 13:52:16,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:52:16,036 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 13:52:16,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:16,067 INFO L225 Difference]: With dead ends: 24366 [2021-06-05 13:52:16,067 INFO L226 Difference]: Without dead ends: 24348 [2021-06-05 13:52:16,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:52:16,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24348 states. [2021-06-05 13:52:16,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24348 to 21626. [2021-06-05 13:52:16,416 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 13:52:16,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21626 states to 21626 states and 57535 transitions. [2021-06-05 13:52:16,451 INFO L78 Accepts]: Start accepts. Automaton has 21626 states and 57535 transitions. Word has length 65 [2021-06-05 13:52:16,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:16,452 INFO L482 AbstractCegarLoop]: Abstraction has 21626 states and 57535 transitions. [2021-06-05 13:52:16,452 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 13:52:16,452 INFO L276 IsEmpty]: Start isEmpty. Operand 21626 states and 57535 transitions. [2021-06-05 13:52:16,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:16,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:16,468 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 13:52:16,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1234,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:16,668 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:16,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:16,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1172605066, now seen corresponding path program 171 times [2021-06-05 13:52:16,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:16,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062468274] [2021-06-05 13:52:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:16,777 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 13:52:16,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:16,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062468274] [2021-06-05 13:52:16,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062468274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:16,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038898965] [2021-06-05 13:52:16,777 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 13:52:16,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 13:52:16,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:16,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:52:16,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:16,936 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 13:52:16,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038898965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:16,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:16,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:52:16,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201059342] [2021-06-05 13:52:16,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:52:16,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:16,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:52:16,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:52:16,937 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 13:52:17,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:17,613 INFO L93 Difference]: Finished difference Result 24595 states and 63247 transitions. [2021-06-05 13:52:17,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:52:17,614 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 13:52:17,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:17,644 INFO L225 Difference]: With dead ends: 24595 [2021-06-05 13:52:17,644 INFO L226 Difference]: Without dead ends: 24545 [2021-06-05 13:52:17,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 179.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:52:17,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24545 states. [2021-06-05 13:52:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24545 to 21849. [2021-06-05 13:52:17,945 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 13:52:17,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21849 states to 21849 states and 58107 transitions. [2021-06-05 13:52:17,981 INFO L78 Accepts]: Start accepts. Automaton has 21849 states and 58107 transitions. Word has length 65 [2021-06-05 13:52:17,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:17,981 INFO L482 AbstractCegarLoop]: Abstraction has 21849 states and 58107 transitions. [2021-06-05 13:52:17,981 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 13:52:17,982 INFO L276 IsEmpty]: Start isEmpty. Operand 21849 states and 58107 transitions. [2021-06-05 13:52:17,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:17,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:17,998 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 13:52:18,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1238 [2021-06-05 13:52:18,199 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:18,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:18,199 INFO L82 PathProgramCache]: Analyzing trace with hash -381091791, now seen corresponding path program 355 times [2021-06-05 13:52:18,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:18,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940004953] [2021-06-05 13:52:18,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:18,272 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 13:52:18,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:18,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940004953] [2021-06-05 13:52:18,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940004953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:18,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807015127] [2021-06-05 13:52:18,272 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 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 13:52:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:18,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:18,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:18,399 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 13:52:18,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807015127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:18,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:18,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:52:18,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051177104] [2021-06-05 13:52:18,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:52:18,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:18,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:52:18,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:52:18,400 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 13:52:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:18,642 INFO L93 Difference]: Finished difference Result 25610 states and 64561 transitions. [2021-06-05 13:52:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:18,643 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 13:52:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:18,680 INFO L225 Difference]: With dead ends: 25610 [2021-06-05 13:52:18,681 INFO L226 Difference]: Without dead ends: 25607 [2021-06-05 13:52:18,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:52:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25607 states. [2021-06-05 13:52:18,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25607 to 21817. [2021-06-05 13:52:18,999 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 13:52:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21817 states to 21817 states and 57986 transitions. [2021-06-05 13:52:19,034 INFO L78 Accepts]: Start accepts. Automaton has 21817 states and 57986 transitions. Word has length 65 [2021-06-05 13:52:19,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:19,034 INFO L482 AbstractCegarLoop]: Abstraction has 21817 states and 57986 transitions. [2021-06-05 13:52:19,034 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 13:52:19,034 INFO L276 IsEmpty]: Start isEmpty. Operand 21817 states and 57986 transitions. [2021-06-05 13:52:19,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:19,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:19,050 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 13:52:19,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1239,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:19,250 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:19,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:19,250 INFO L82 PathProgramCache]: Analyzing trace with hash -174029225, now seen corresponding path program 356 times [2021-06-05 13:52:19,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:19,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484084925] [2021-06-05 13:52:19,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:19,330 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 13:52:19,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:19,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484084925] [2021-06-05 13:52:19,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484084925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:19,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566406595] [2021-06-05 13:52:19,330 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 13:52:19,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:19,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:19,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:19,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:19,455 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 13:52:19,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566406595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:19,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:19,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:52:19,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902706728] [2021-06-05 13:52:19,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:52:19,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:19,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:52:19,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:52:19,456 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 13:52:19,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:19,752 INFO L93 Difference]: Finished difference Result 25614 states and 64489 transitions. [2021-06-05 13:52:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:52:19,753 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 13:52:19,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:19,786 INFO L225 Difference]: With dead ends: 25614 [2021-06-05 13:52:19,786 INFO L226 Difference]: Without dead ends: 25596 [2021-06-05 13:52:19,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:19,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25596 states. [2021-06-05 13:52:20,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25596 to 21817. [2021-06-05 13:52:20,159 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 13:52:20,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21817 states to 21817 states and 57952 transitions. [2021-06-05 13:52:20,196 INFO L78 Accepts]: Start accepts. Automaton has 21817 states and 57952 transitions. Word has length 65 [2021-06-05 13:52:20,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:20,196 INFO L482 AbstractCegarLoop]: Abstraction has 21817 states and 57952 transitions. [2021-06-05 13:52:20,196 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 13:52:20,197 INFO L276 IsEmpty]: Start isEmpty. Operand 21817 states and 57952 transitions. [2021-06-05 13:52:20,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:20,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:20,213 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 13:52:20,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:20,414 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:20,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:20,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1622029238, now seen corresponding path program 357 times [2021-06-05 13:52:20,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:20,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580536306] [2021-06-05 13:52:20,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:20,516 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 13:52:20,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:20,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580536306] [2021-06-05 13:52:20,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580536306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:20,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316075785] [2021-06-05 13:52:20,516 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 13:52:20,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 13:52:20,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:20,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:52:20,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:20,659 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 13:52:20,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316075785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:20,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:20,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:52:20,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9448204] [2021-06-05 13:52:20,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:52:20,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:20,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:52:20,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:52:20,660 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 13:52:21,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:21,527 INFO L93 Difference]: Finished difference Result 23463 states and 60807 transitions. [2021-06-05 13:52:21,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:52:21,527 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 13:52:21,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:21,554 INFO L225 Difference]: With dead ends: 23463 [2021-06-05 13:52:21,554 INFO L226 Difference]: Without dead ends: 23407 [2021-06-05 13:52:21,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 178.5ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:52:21,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23407 states. [2021-06-05 13:52:21,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23407 to 21785. [2021-06-05 13:52:21,842 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 13:52:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21785 states to 21785 states and 57821 transitions. [2021-06-05 13:52:21,879 INFO L78 Accepts]: Start accepts. Automaton has 21785 states and 57821 transitions. Word has length 65 [2021-06-05 13:52:21,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:21,879 INFO L482 AbstractCegarLoop]: Abstraction has 21785 states and 57821 transitions. [2021-06-05 13:52:21,879 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 13:52:21,879 INFO L276 IsEmpty]: Start isEmpty. Operand 21785 states and 57821 transitions. [2021-06-05 13:52:21,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:21,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:21,895 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 13:52:22,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 579 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1244 [2021-06-05 13:52:22,095 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:22,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:22,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2059401878, now seen corresponding path program 358 times [2021-06-05 13:52:22,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:22,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633998952] [2021-06-05 13:52:22,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:22,202 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 13:52:22,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:22,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633998952] [2021-06-05 13:52:22,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633998952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:22,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714139138] [2021-06-05 13:52:22,203 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 13:52:22,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:22,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:22,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:52:22,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:22,330 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 13:52:22,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714139138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:22,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:22,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:52:22,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468978219] [2021-06-05 13:52:22,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:52:22,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:22,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:52:22,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:52:22,331 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 13:52:23,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:23,037 INFO L93 Difference]: Finished difference Result 24092 states and 62187 transitions. [2021-06-05 13:52:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:52:23,038 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 13:52:23,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:23,065 INFO L225 Difference]: With dead ends: 24092 [2021-06-05 13:52:23,065 INFO L226 Difference]: Without dead ends: 24080 [2021-06-05 13:52:23,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:52:23,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24080 states. [2021-06-05 13:52:23,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24080 to 21828. [2021-06-05 13:52:23,351 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 13:52:23,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21828 states to 21828 states and 57911 transitions. [2021-06-05 13:52:23,391 INFO L78 Accepts]: Start accepts. Automaton has 21828 states and 57911 transitions. Word has length 65 [2021-06-05 13:52:23,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:23,391 INFO L482 AbstractCegarLoop]: Abstraction has 21828 states and 57911 transitions. [2021-06-05 13:52:23,391 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 13:52:23,391 INFO L276 IsEmpty]: Start isEmpty. Operand 21828 states and 57911 transitions. [2021-06-05 13:52:23,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:23,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:23,408 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 13:52:23,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1245 [2021-06-05 13:52:23,609 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:23,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:23,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1902102391, now seen corresponding path program 172 times [2021-06-05 13:52:23,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:23,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433233338] [2021-06-05 13:52:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:23,690 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 13:52:23,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:23,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433233338] [2021-06-05 13:52:23,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433233338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:23,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963524434] [2021-06-05 13:52:23,691 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 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 13:52:23,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:23,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:23,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:23,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:23,823 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 13:52:23,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963524434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:23,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:23,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:52:23,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790108854] [2021-06-05 13:52:23,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:52:23,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:23,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:52:23,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:52:23,824 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 13:52:24,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:24,164 INFO L93 Difference]: Finished difference Result 28795 states and 71587 transitions. [2021-06-05 13:52:24,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:52:24,165 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 13:52:24,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:24,197 INFO L225 Difference]: With dead ends: 28795 [2021-06-05 13:52:24,198 INFO L226 Difference]: Without dead ends: 28765 [2021-06-05 13:52:24,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:52:24,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28765 states. [2021-06-05 13:52:24,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28765 to 21897. [2021-06-05 13:52:24,481 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 13:52:24,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21897 states to 21897 states and 58076 transitions. [2021-06-05 13:52:24,518 INFO L78 Accepts]: Start accepts. Automaton has 21897 states and 58076 transitions. Word has length 65 [2021-06-05 13:52:24,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:24,518 INFO L482 AbstractCegarLoop]: Abstraction has 21897 states and 58076 transitions. [2021-06-05 13:52:24,518 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 13:52:24,518 INFO L276 IsEmpty]: Start isEmpty. Operand 21897 states and 58076 transitions. [2021-06-05 13:52:24,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:24,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:24,533 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 13:52:24,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1246,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:24,733 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:24,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:24,733 INFO L82 PathProgramCache]: Analyzing trace with hash -93648084, now seen corresponding path program 359 times [2021-06-05 13:52:24,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:24,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176853917] [2021-06-05 13:52:24,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:24,842 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 13:52:24,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:24,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176853917] [2021-06-05 13:52:24,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176853917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:24,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424023140] [2021-06-05 13:52:24,842 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 13:52:24,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 13:52:24,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:24,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:52:24,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:24,972 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 13:52:24,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424023140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:24,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:24,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:52:24,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142753412] [2021-06-05 13:52:24,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:52:24,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:24,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:52:24,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:52:24,973 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 13:52:25,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:25,812 INFO L93 Difference]: Finished difference Result 25821 states and 65999 transitions. [2021-06-05 13:52:25,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:52:25,812 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 13:52:25,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:25,850 INFO L225 Difference]: With dead ends: 25821 [2021-06-05 13:52:25,850 INFO L226 Difference]: Without dead ends: 25779 [2021-06-05 13:52:25,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 226.2ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:52:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25779 states. [2021-06-05 13:52:26,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25779 to 21985. [2021-06-05 13:52:26,153 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 13:52:26,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21985 states to 21985 states and 58317 transitions. [2021-06-05 13:52:26,191 INFO L78 Accepts]: Start accepts. Automaton has 21985 states and 58317 transitions. Word has length 65 [2021-06-05 13:52:26,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:26,191 INFO L482 AbstractCegarLoop]: Abstraction has 21985 states and 58317 transitions. [2021-06-05 13:52:26,191 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 13:52:26,191 INFO L276 IsEmpty]: Start isEmpty. Operand 21985 states and 58317 transitions. [2021-06-05 13:52:26,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:26,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:26,207 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 13:52:26,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1249 [2021-06-05 13:52:26,408 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:26,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:26,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1438911025, now seen corresponding path program 360 times [2021-06-05 13:52:26,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:26,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148154356] [2021-06-05 13:52:26,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:26,497 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 13:52:26,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:26,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148154356] [2021-06-05 13:52:26,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148154356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:26,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940873075] [2021-06-05 13:52:26,497 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 13:52:26,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 13:52:26,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:26,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:26,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:26,626 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 13:52:26,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940873075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:26,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:26,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 13:52:26,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033333994] [2021-06-05 13:52:26,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:52:26,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:26,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:52:26,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:52:26,626 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 13:52:26,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:26,919 INFO L93 Difference]: Finished difference Result 25751 states and 64746 transitions. [2021-06-05 13:52:26,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:52:26,919 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 13:52:26,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:26,958 INFO L225 Difference]: With dead ends: 25751 [2021-06-05 13:52:26,958 INFO L226 Difference]: Without dead ends: 25727 [2021-06-05 13:52:26,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:52:26,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25727 states. [2021-06-05 13:52:27,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25727 to 21464. [2021-06-05 13:52:27,283 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 13:52:27,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21464 states to 21464 states and 56807 transitions. [2021-06-05 13:52:27,321 INFO L78 Accepts]: Start accepts. Automaton has 21464 states and 56807 transitions. Word has length 65 [2021-06-05 13:52:27,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:27,321 INFO L482 AbstractCegarLoop]: Abstraction has 21464 states and 56807 transitions. [2021-06-05 13:52:27,321 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 13:52:27,321 INFO L276 IsEmpty]: Start isEmpty. Operand 21464 states and 56807 transitions. [2021-06-05 13:52:27,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:27,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:27,337 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 13:52:27,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1250 [2021-06-05 13:52:27,537 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:27,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:27,537 INFO L82 PathProgramCache]: Analyzing trace with hash 61188450, now seen corresponding path program 361 times [2021-06-05 13:52:27,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:27,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018421600] [2021-06-05 13:52:27,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:27,660 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 13:52:27,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:27,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018421600] [2021-06-05 13:52:27,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018421600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:27,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409177871] [2021-06-05 13:52:27,661 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 13:52:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:27,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:52:27,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:27,787 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 13:52:27,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409177871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:27,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:27,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:52:27,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439609327] [2021-06-05 13:52:27,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:52:27,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:27,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:52:27,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:27,788 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 13:52:28,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:28,792 INFO L93 Difference]: Finished difference Result 26000 states and 65957 transitions. [2021-06-05 13:52:28,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:52:28,792 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 13:52:28,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:28,826 INFO L225 Difference]: With dead ends: 26000 [2021-06-05 13:52:28,826 INFO L226 Difference]: Without dead ends: 25946 [2021-06-05 13:52:28,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 250.5ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:52:28,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25946 states. [2021-06-05 13:52:29,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25946 to 21403. [2021-06-05 13:52:29,114 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 13:52:29,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21403 states to 21403 states and 56605 transitions. [2021-06-05 13:52:29,151 INFO L78 Accepts]: Start accepts. Automaton has 21403 states and 56605 transitions. Word has length 65 [2021-06-05 13:52:29,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:29,152 INFO L482 AbstractCegarLoop]: Abstraction has 21403 states and 56605 transitions. [2021-06-05 13:52:29,152 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 13:52:29,152 INFO L276 IsEmpty]: Start isEmpty. Operand 21403 states and 56605 transitions. [2021-06-05 13:52:29,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:29,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:29,168 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 13:52:29,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 584 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1254 [2021-06-05 13:52:29,369 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:29,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:29,369 INFO L82 PathProgramCache]: Analyzing trace with hash -798753477, now seen corresponding path program 173 times [2021-06-05 13:52:29,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:29,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863347667] [2021-06-05 13:52:29,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:29,446 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 13:52:29,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:29,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863347667] [2021-06-05 13:52:29,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863347667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:29,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807948659] [2021-06-05 13:52:29,447 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 13:52:29,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 13:52:29,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:29,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:29,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:29,655 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 13:52:29,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807948659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:29,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:29,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2021-06-05 13:52:29,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213835633] [2021-06-05 13:52:29,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:52:29,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:29,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:52:29,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:52:29,656 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 13:52:30,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:30,127 INFO L93 Difference]: Finished difference Result 34849 states and 85268 transitions. [2021-06-05 13:52:30,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:52:30,128 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 13:52:30,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:30,169 INFO L225 Difference]: With dead ends: 34849 [2021-06-05 13:52:30,169 INFO L226 Difference]: Without dead ends: 34849 [2021-06-05 13:52:30,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=303, Invalid=453, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:52:30,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34849 states. [2021-06-05 13:52:30,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34849 to 21691. [2021-06-05 13:52:30,504 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 13:52:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21691 states to 21691 states and 57486 transitions. [2021-06-05 13:52:30,539 INFO L78 Accepts]: Start accepts. Automaton has 21691 states and 57486 transitions. Word has length 65 [2021-06-05 13:52:30,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:30,539 INFO L482 AbstractCegarLoop]: Abstraction has 21691 states and 57486 transitions. [2021-06-05 13:52:30,539 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 13:52:30,539 INFO L276 IsEmpty]: Start isEmpty. Operand 21691 states and 57486 transitions. [2021-06-05 13:52:30,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:30,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:30,554 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 13:52:30,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1255 [2021-06-05 13:52:30,754 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:30,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1858641363, now seen corresponding path program 174 times [2021-06-05 13:52:30,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:30,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267947410] [2021-06-05 13:52:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:30,845 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 13:52:30,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:30,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267947410] [2021-06-05 13:52:30,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267947410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:30,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520051330] [2021-06-05 13:52:30,846 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 13:52:30,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 13:52:30,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:30,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:30,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:30,989 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 13:52:30,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520051330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:30,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:30,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 13:52:30,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408030535] [2021-06-05 13:52:30,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:52:30,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:30,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:52:30,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:30,990 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 13:52:31,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:31,339 INFO L93 Difference]: Finished difference Result 33025 states and 80919 transitions. [2021-06-05 13:52:31,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:52:31,340 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 13:52:31,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:31,379 INFO L225 Difference]: With dead ends: 33025 [2021-06-05 13:52:31,379 INFO L226 Difference]: Without dead ends: 33025 [2021-06-05 13:52:31,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:52:31,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33025 states. [2021-06-05 13:52:31,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33025 to 21674. [2021-06-05 13:52:31,776 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 13:52:31,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21674 states to 21674 states and 57411 transitions. [2021-06-05 13:52:31,810 INFO L78 Accepts]: Start accepts. Automaton has 21674 states and 57411 transitions. Word has length 65 [2021-06-05 13:52:31,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:31,810 INFO L482 AbstractCegarLoop]: Abstraction has 21674 states and 57411 transitions. [2021-06-05 13:52:31,810 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 13:52:31,810 INFO L276 IsEmpty]: Start isEmpty. Operand 21674 states and 57411 transitions. [2021-06-05 13:52:31,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:31,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:31,825 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 13:52:32,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1256 [2021-06-05 13:52:32,026 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:32,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:32,026 INFO L82 PathProgramCache]: Analyzing trace with hash 168646199, now seen corresponding path program 175 times [2021-06-05 13:52:32,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:32,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924407370] [2021-06-05 13:52:32,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:32,127 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 13:52:32,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:32,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924407370] [2021-06-05 13:52:32,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924407370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:32,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075195109] [2021-06-05 13:52:32,128 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 13:52:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:32,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:32,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:32,263 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 13:52:32,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075195109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:32,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:32,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 13:52:32,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006480647] [2021-06-05 13:52:32,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:32,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:32,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:32,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:32,264 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 13:52:32,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:32,621 INFO L93 Difference]: Finished difference Result 29232 states and 72460 transitions. [2021-06-05 13:52:32,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:52:32,622 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 13:52:32,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:32,657 INFO L225 Difference]: With dead ends: 29232 [2021-06-05 13:52:32,657 INFO L226 Difference]: Without dead ends: 29232 [2021-06-05 13:52:32,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:52:32,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29232 states. [2021-06-05 13:52:32,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29232 to 21133. [2021-06-05 13:52:32,965 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 13:52:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21133 states to 21133 states and 55817 transitions. [2021-06-05 13:52:32,999 INFO L78 Accepts]: Start accepts. Automaton has 21133 states and 55817 transitions. Word has length 65 [2021-06-05 13:52:32,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:32,999 INFO L482 AbstractCegarLoop]: Abstraction has 21133 states and 55817 transitions. [2021-06-05 13:52:32,999 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 13:52:32,999 INFO L276 IsEmpty]: Start isEmpty. Operand 21133 states and 55817 transitions. [2021-06-05 13:52:33,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:33,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:33,014 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 13:52:33,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-06-05 13:52:33,214 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:33,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:33,215 INFO L82 PathProgramCache]: Analyzing trace with hash 447791127, now seen corresponding path program 362 times [2021-06-05 13:52:33,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:33,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029395927] [2021-06-05 13:52:33,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:33,313 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 13:52:33,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:33,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029395927] [2021-06-05 13:52:33,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029395927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:33,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285018013] [2021-06-05 13:52:33,313 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 13:52:33,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:33,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:33,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:33,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:33,449 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 13:52:33,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285018013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:33,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:33,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 13:52:33,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672625487] [2021-06-05 13:52:33,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:52:33,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:33,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:52:33,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:33,450 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 13:52:33,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:33,696 INFO L93 Difference]: Finished difference Result 24649 states and 61830 transitions. [2021-06-05 13:52:33,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:52:33,696 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 13:52:33,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:33,732 INFO L225 Difference]: With dead ends: 24649 [2021-06-05 13:52:33,732 INFO L226 Difference]: Without dead ends: 24622 [2021-06-05 13:52:33,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:52:33,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24622 states. [2021-06-05 13:52:34,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24622 to 21133. [2021-06-05 13:52:34,025 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 13:52:34,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21133 states to 21133 states and 55805 transitions. [2021-06-05 13:52:34,058 INFO L78 Accepts]: Start accepts. Automaton has 21133 states and 55805 transitions. Word has length 65 [2021-06-05 13:52:34,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:34,058 INFO L482 AbstractCegarLoop]: Abstraction has 21133 states and 55805 transitions. [2021-06-05 13:52:34,058 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 13:52:34,058 INFO L276 IsEmpty]: Start isEmpty. Operand 21133 states and 55805 transitions. [2021-06-05 13:52:34,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:34,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:34,073 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 13:52:34,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1258,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:34,274 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:34,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:34,274 INFO L82 PathProgramCache]: Analyzing trace with hash -275453914, now seen corresponding path program 176 times [2021-06-05 13:52:34,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:34,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127663622] [2021-06-05 13:52:34,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:34,381 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 13:52:34,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:34,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127663622] [2021-06-05 13:52:34,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127663622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:34,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739375237] [2021-06-05 13:52:34,382 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 13:52:34,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:34,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:34,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:52:34,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:34,508 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 13:52:34,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739375237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:34,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:34,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:52:34,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440915088] [2021-06-05 13:52:34,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:52:34,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:34,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:52:34,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:52:34,509 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 13:52:35,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:35,169 INFO L93 Difference]: Finished difference Result 23655 states and 60711 transitions. [2021-06-05 13:52:35,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:52:35,169 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 13:52:35,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:35,197 INFO L225 Difference]: With dead ends: 23655 [2021-06-05 13:52:35,197 INFO L226 Difference]: Without dead ends: 23612 [2021-06-05 13:52:35,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:52:35,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23612 states. [2021-06-05 13:52:35,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23612 to 21337. [2021-06-05 13:52:35,533 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 13:52:35,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21337 states to 21337 states and 56318 transitions. [2021-06-05 13:52:35,568 INFO L78 Accepts]: Start accepts. Automaton has 21337 states and 56318 transitions. Word has length 65 [2021-06-05 13:52:35,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:35,568 INFO L482 AbstractCegarLoop]: Abstraction has 21337 states and 56318 transitions. [2021-06-05 13:52:35,568 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 13:52:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand 21337 states and 56318 transitions. [2021-06-05 13:52:35,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:35,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:35,585 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 13:52:35,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1263,589 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:35,801 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:35,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:35,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1829150771, now seen corresponding path program 363 times [2021-06-05 13:52:35,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:35,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108724179] [2021-06-05 13:52:35,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:35,871 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 13:52:35,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:35,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108724179] [2021-06-05 13:52:35,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108724179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:35,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018601759] [2021-06-05 13:52:35,871 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 13:52:35,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 13:52:35,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:35,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:35,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:36,002 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 13:52:36,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018601759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:36,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:36,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:52:36,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321896965] [2021-06-05 13:52:36,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:52:36,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:36,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:52:36,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:52:36,003 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 13:52:36,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:36,215 INFO L93 Difference]: Finished difference Result 25552 states and 63612 transitions. [2021-06-05 13:52:36,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:36,216 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 13:52:36,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:36,249 INFO L225 Difference]: With dead ends: 25552 [2021-06-05 13:52:36,249 INFO L226 Difference]: Without dead ends: 25549 [2021-06-05 13:52:36,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:52:36,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25549 states. [2021-06-05 13:52:36,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25549 to 21311. [2021-06-05 13:52:36,548 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 13:52:36,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21311 states to 21311 states and 56220 transitions. [2021-06-05 13:52:36,582 INFO L78 Accepts]: Start accepts. Automaton has 21311 states and 56220 transitions. Word has length 65 [2021-06-05 13:52:36,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:36,582 INFO L482 AbstractCegarLoop]: Abstraction has 21311 states and 56220 transitions. [2021-06-05 13:52:36,582 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 13:52:36,582 INFO L276 IsEmpty]: Start isEmpty. Operand 21311 states and 56220 transitions. [2021-06-05 13:52:36,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:36,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:36,598 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 13:52:36,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1264 [2021-06-05 13:52:36,798 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:36,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:36,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1622088205, now seen corresponding path program 364 times [2021-06-05 13:52:36,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:36,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135645753] [2021-06-05 13:52:36,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:36,878 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 13:52:36,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:36,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135645753] [2021-06-05 13:52:36,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135645753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:36,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929325770] [2021-06-05 13:52:36,878 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 13:52:36,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:36,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:36,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:36,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:37,003 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 13:52:37,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929325770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:37,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:37,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:52:37,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380431426] [2021-06-05 13:52:37,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:52:37,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:37,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:52:37,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:52:37,004 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 13:52:37,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:37,298 INFO L93 Difference]: Finished difference Result 25562 states and 63563 transitions. [2021-06-05 13:52:37,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:52:37,299 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 13:52:37,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:37,333 INFO L225 Difference]: With dead ends: 25562 [2021-06-05 13:52:37,333 INFO L226 Difference]: Without dead ends: 25544 [2021-06-05 13:52:37,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:37,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25544 states. [2021-06-05 13:52:37,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25544 to 21311. [2021-06-05 13:52:37,627 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 13:52:37,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21311 states to 21311 states and 56192 transitions. [2021-06-05 13:52:37,659 INFO L78 Accepts]: Start accepts. Automaton has 21311 states and 56192 transitions. Word has length 65 [2021-06-05 13:52:37,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:37,659 INFO L482 AbstractCegarLoop]: Abstraction has 21311 states and 56192 transitions. [2021-06-05 13:52:37,660 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 13:52:37,660 INFO L276 IsEmpty]: Start isEmpty. Operand 21311 states and 56192 transitions. [2021-06-05 13:52:37,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:37,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:37,674 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 13:52:37,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1266 [2021-06-05 13:52:37,874 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:37,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:37,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1224879078, now seen corresponding path program 365 times [2021-06-05 13:52:37,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:37,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290274891] [2021-06-05 13:52:37,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:37,981 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 13:52:37,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:37,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290274891] [2021-06-05 13:52:37,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290274891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:37,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155179784] [2021-06-05 13:52:37,981 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 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 13:52:38,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 13:52:38,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:38,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:52:38,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:38,122 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 13:52:38,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155179784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:38,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:38,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:52:38,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315163197] [2021-06-05 13:52:38,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:52:38,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:38,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:52:38,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:52:38,123 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 13:52:38,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:38,991 INFO L93 Difference]: Finished difference Result 22721 states and 58670 transitions. [2021-06-05 13:52:38,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:52:38,991 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 13:52:38,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:39,017 INFO L225 Difference]: With dead ends: 22721 [2021-06-05 13:52:39,017 INFO L226 Difference]: Without dead ends: 22647 [2021-06-05 13:52:39,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:52:39,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22647 states. [2021-06-05 13:52:39,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22647 to 21285. [2021-06-05 13:52:39,360 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 13:52:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21285 states to 21285 states and 56071 transitions. [2021-06-05 13:52:39,394 INFO L78 Accepts]: Start accepts. Automaton has 21285 states and 56071 transitions. Word has length 65 [2021-06-05 13:52:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:39,394 INFO L482 AbstractCegarLoop]: Abstraction has 21285 states and 56071 transitions. [2021-06-05 13:52:39,394 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 13:52:39,394 INFO L276 IsEmpty]: Start isEmpty. Operand 21285 states and 56071 transitions. [2021-06-05 13:52:39,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:39,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:39,410 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 13:52:39,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1269 [2021-06-05 13:52:39,611 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:39,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:39,611 INFO L82 PathProgramCache]: Analyzing trace with hash 611342898, now seen corresponding path program 366 times [2021-06-05 13:52:39,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:39,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420925176] [2021-06-05 13:52:39,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:39,721 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 13:52:39,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:39,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420925176] [2021-06-05 13:52:39,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420925176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:39,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611666891] [2021-06-05 13:52:39,721 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 13:52:39,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 13:52:39,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:39,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:52:39,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:39,853 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 13:52:39,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611666891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:39,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:39,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:52:39,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618201492] [2021-06-05 13:52:39,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:52:39,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:39,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:52:39,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:52:39,854 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 13:52:40,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:40,534 INFO L93 Difference]: Finished difference Result 23377 states and 60094 transitions. [2021-06-05 13:52:40,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:52:40,535 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 13:52:40,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:40,565 INFO L225 Difference]: With dead ends: 23377 [2021-06-05 13:52:40,565 INFO L226 Difference]: Without dead ends: 23365 [2021-06-05 13:52:40,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:52:40,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23365 states. [2021-06-05 13:52:40,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23365 to 21337. [2021-06-05 13:52:40,843 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 13:52:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21337 states to 21337 states and 56187 transitions. [2021-06-05 13:52:40,875 INFO L78 Accepts]: Start accepts. Automaton has 21337 states and 56187 transitions. Word has length 65 [2021-06-05 13:52:40,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:40,875 INFO L482 AbstractCegarLoop]: Abstraction has 21337 states and 56187 transitions. [2021-06-05 13:52:40,875 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 13:52:40,876 INFO L276 IsEmpty]: Start isEmpty. Operand 21337 states and 56187 transitions. [2021-06-05 13:52:40,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:40,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:40,890 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 13:52:41,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1270,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:41,090 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:41,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:41,091 INFO L82 PathProgramCache]: Analyzing trace with hash 454043411, now seen corresponding path program 177 times [2021-06-05 13:52:41,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:41,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782255348] [2021-06-05 13:52:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:41,168 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 13:52:41,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:41,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782255348] [2021-06-05 13:52:41,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782255348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:41,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283257837] [2021-06-05 13:52:41,169 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 13:52:41,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 13:52:41,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:41,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:41,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:41,305 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 13:52:41,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283257837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:41,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:41,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:52:41,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885580576] [2021-06-05 13:52:41,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:52:41,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:41,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:52:41,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:52:41,306 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 13:52:41,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:41,560 INFO L93 Difference]: Finished difference Result 27785 states and 69129 transitions. [2021-06-05 13:52:41,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:52:41,561 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 13:52:41,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:41,598 INFO L225 Difference]: With dead ends: 27785 [2021-06-05 13:52:41,598 INFO L226 Difference]: Without dead ends: 27755 [2021-06-05 13:52:41,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:52:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27755 states. [2021-06-05 13:52:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27755 to 21784. [2021-06-05 13:52:41,931 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 13:52:41,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21784 states to 21784 states and 57489 transitions. [2021-06-05 13:52:41,967 INFO L78 Accepts]: Start accepts. Automaton has 21784 states and 57489 transitions. Word has length 65 [2021-06-05 13:52:41,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:41,967 INFO L482 AbstractCegarLoop]: Abstraction has 21784 states and 57489 transitions. [2021-06-05 13:52:41,967 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 13:52:41,967 INFO L276 IsEmpty]: Start isEmpty. Operand 21784 states and 57489 transitions. [2021-06-05 13:52:41,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:41,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:41,983 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 13:52:42,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1271,594 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:42,183 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:42,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:42,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1541707064, now seen corresponding path program 367 times [2021-06-05 13:52:42,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:42,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288892435] [2021-06-05 13:52:42,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:42,309 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 13:52:42,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:42,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288892435] [2021-06-05 13:52:42,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288892435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:42,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234427430] [2021-06-05 13:52:42,309 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 13:52:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:42,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:52:42,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:42,459 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 13:52:42,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234427430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:42,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:42,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:52:42,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370488337] [2021-06-05 13:52:42,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:52:42,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:42,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:52:42,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:52:42,460 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 13:52:43,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:43,428 INFO L93 Difference]: Finished difference Result 25899 states and 65956 transitions. [2021-06-05 13:52:43,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:52:43,429 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 13:52:43,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:43,457 INFO L225 Difference]: With dead ends: 25899 [2021-06-05 13:52:43,457 INFO L226 Difference]: Without dead ends: 25845 [2021-06-05 13:52:43,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 274.7ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:52:43,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25845 states. [2021-06-05 13:52:43,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25845 to 21962. [2021-06-05 13:52:43,729 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 13:52:43,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21962 states to 21962 states and 57960 transitions. [2021-06-05 13:52:43,764 INFO L78 Accepts]: Start accepts. Automaton has 21962 states and 57960 transitions. Word has length 65 [2021-06-05 13:52:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:43,764 INFO L482 AbstractCegarLoop]: Abstraction has 21962 states and 57960 transitions. [2021-06-05 13:52:43,764 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 13:52:43,764 INFO L276 IsEmpty]: Start isEmpty. Operand 21962 states and 57960 transitions. [2021-06-05 13:52:43,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:43,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:43,780 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 13:52:43,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1274,595 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:43,980 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:43,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:43,980 INFO L82 PathProgramCache]: Analyzing trace with hash -9147955, now seen corresponding path program 368 times [2021-06-05 13:52:43,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:43,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843952026] [2021-06-05 13:52:43,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:44,066 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 13:52:44,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:44,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843952026] [2021-06-05 13:52:44,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843952026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:44,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496290915] [2021-06-05 13:52:44,066 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 13:52:44,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:44,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:44,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:44,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:44,191 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 13:52:44,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496290915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:44,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:44,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 13:52:44,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435303057] [2021-06-05 13:52:44,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:52:44,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:44,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:52:44,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:52:44,192 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 13:52:44,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:44,461 INFO L93 Difference]: Finished difference Result 26218 states and 65296 transitions. [2021-06-05 13:52:44,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:52:44,462 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 13:52:44,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:44,495 INFO L225 Difference]: With dead ends: 26218 [2021-06-05 13:52:44,495 INFO L226 Difference]: Without dead ends: 26194 [2021-06-05 13:52:44,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:52:44,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26194 states. [2021-06-05 13:52:44,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26194 to 21962. [2021-06-05 13:52:44,799 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 13:52:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21962 states to 21962 states and 57943 transitions. [2021-06-05 13:52:44,836 INFO L78 Accepts]: Start accepts. Automaton has 21962 states and 57943 transitions. Word has length 65 [2021-06-05 13:52:44,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:44,836 INFO L482 AbstractCegarLoop]: Abstraction has 21962 states and 57943 transitions. [2021-06-05 13:52:44,836 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 13:52:44,836 INFO L276 IsEmpty]: Start isEmpty. Operand 21962 states and 57943 transitions. [2021-06-05 13:52:44,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:44,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:44,852 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 13:52:45,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 596 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1275 [2021-06-05 13:52:45,052 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:45,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:45,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1386870530, now seen corresponding path program 369 times [2021-06-05 13:52:45,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:45,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342385828] [2021-06-05 13:52:45,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:45,175 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 13:52:45,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:45,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342385828] [2021-06-05 13:52:45,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342385828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:45,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501590127] [2021-06-05 13:52:45,175 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 13:52:45,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 13:52:45,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:45,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:52:45,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:45,308 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 13:52:45,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501590127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:45,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:45,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:52:45,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562085645] [2021-06-05 13:52:45,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:52:45,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:45,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:52:45,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:45,309 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 13:52:46,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:46,404 INFO L93 Difference]: Finished difference Result 29175 states and 73161 transitions. [2021-06-05 13:52:46,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 13:52:46,405 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 13:52:46,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:46,441 INFO L225 Difference]: With dead ends: 29175 [2021-06-05 13:52:46,442 INFO L226 Difference]: Without dead ends: 29061 [2021-06-05 13:52:46,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 397.3ms TimeCoverageRelationStatistics Valid=189, Invalid=1451, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:52:46,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29061 states. [2021-06-05 13:52:46,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29061 to 22155. [2021-06-05 13:52:46,763 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 13:52:46,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22155 states to 22155 states and 58457 transitions. [2021-06-05 13:52:46,802 INFO L78 Accepts]: Start accepts. Automaton has 22155 states and 58457 transitions. Word has length 65 [2021-06-05 13:52:46,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:46,802 INFO L482 AbstractCegarLoop]: Abstraction has 22155 states and 58457 transitions. [2021-06-05 13:52:46,802 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 13:52:46,802 INFO L276 IsEmpty]: Start isEmpty. Operand 22155 states and 58457 transitions. [2021-06-05 13:52:46,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:46,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:46,818 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 13:52:47,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1279 [2021-06-05 13:52:47,018 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:47,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:47,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1000267853, now seen corresponding path program 370 times [2021-06-05 13:52:47,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:47,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171920155] [2021-06-05 13:52:47,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:47,114 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 13:52:47,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:47,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171920155] [2021-06-05 13:52:47,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171920155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:47,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948257550] [2021-06-05 13:52:47,220 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 13:52:47,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:47,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:47,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:47,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:47,348 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 13:52:47,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948257550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:47,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:47,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 13:52:47,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206461837] [2021-06-05 13:52:47,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:52:47,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:47,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:52:47,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:47,349 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 13:52:47,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:47,640 INFO L93 Difference]: Finished difference Result 26448 states and 65859 transitions. [2021-06-05 13:52:47,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:52:47,640 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 13:52:47,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:47,674 INFO L225 Difference]: With dead ends: 26448 [2021-06-05 13:52:47,674 INFO L226 Difference]: Without dead ends: 26415 [2021-06-05 13:52:47,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:52:47,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26415 states. [2021-06-05 13:52:47,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26415 to 21652. [2021-06-05 13:52:47,981 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 13:52:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21652 states to 21652 states and 57019 transitions. [2021-06-05 13:52:48,018 INFO L78 Accepts]: Start accepts. Automaton has 21652 states and 57019 transitions. Word has length 65 [2021-06-05 13:52:48,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:48,018 INFO L482 AbstractCegarLoop]: Abstraction has 21652 states and 57019 transitions. [2021-06-05 13:52:48,018 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 13:52:48,018 INFO L276 IsEmpty]: Start isEmpty. Operand 21652 states and 57019 transitions. [2021-06-05 13:52:48,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:48,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:48,034 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 13:52:48,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1280,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:48,235 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:48,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:48,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1446562040, now seen corresponding path program 371 times [2021-06-05 13:52:48,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:48,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098728899] [2021-06-05 13:52:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:48,367 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 13:52:48,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:48,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098728899] [2021-06-05 13:52:48,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098728899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:48,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168115109] [2021-06-05 13:52:48,368 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 13:52:48,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 13:52:48,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:48,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:52:48,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:48,500 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 13:52:48,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168115109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:48,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:48,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:52:48,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160223286] [2021-06-05 13:52:48,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:48,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:48,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:48,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:48,501 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 13:52:49,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:49,448 INFO L93 Difference]: Finished difference Result 27644 states and 69399 transitions. [2021-06-05 13:52:49,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:52:49,449 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 13:52:49,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:49,481 INFO L225 Difference]: With dead ends: 27644 [2021-06-05 13:52:49,482 INFO L226 Difference]: Without dead ends: 27488 [2021-06-05 13:52:49,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 296.9ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:52:49,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27488 states. [2021-06-05 13:52:49,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27488 to 21271. [2021-06-05 13:52:49,772 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 13:52:49,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21271 states to 21271 states and 55956 transitions. [2021-06-05 13:52:49,808 INFO L78 Accepts]: Start accepts. Automaton has 21271 states and 55956 transitions. Word has length 65 [2021-06-05 13:52:49,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:49,808 INFO L482 AbstractCegarLoop]: Abstraction has 21271 states and 55956 transitions. [2021-06-05 13:52:49,808 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 13:52:49,808 INFO L276 IsEmpty]: Start isEmpty. Operand 21271 states and 55956 transitions. [2021-06-05 13:52:49,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:49,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:49,823 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 13:52:50,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1285,599 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:50,024 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:50,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:50,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1988463329, now seen corresponding path program 178 times [2021-06-05 13:52:50,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:50,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819395693] [2021-06-05 13:52:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:50,100 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 13:52:50,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:50,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819395693] [2021-06-05 13:52:50,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819395693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:50,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286599174] [2021-06-05 13:52:50,100 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 13:52:50,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:50,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:50,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:50,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:50,232 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 13:52:50,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286599174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:50,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:50,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:52:50,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603093745] [2021-06-05 13:52:50,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:52:50,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:50,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:52:50,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:52:50,233 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 13:52:50,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:50,530 INFO L93 Difference]: Finished difference Result 33905 states and 83190 transitions. [2021-06-05 13:52:50,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:52:50,530 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 13:52:50,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:50,572 INFO L225 Difference]: With dead ends: 33905 [2021-06-05 13:52:50,572 INFO L226 Difference]: Without dead ends: 33905 [2021-06-05 13:52:50,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=131, Invalid=175, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:52:50,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33905 states. [2021-06-05 13:52:50,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33905 to 21594. [2021-06-05 13:52:50,986 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 13:52:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21594 states to 21594 states and 56953 transitions. [2021-06-05 13:52:51,020 INFO L78 Accepts]: Start accepts. Automaton has 21594 states and 56953 transitions. Word has length 65 [2021-06-05 13:52:51,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:51,020 INFO L482 AbstractCegarLoop]: Abstraction has 21594 states and 56953 transitions. [2021-06-05 13:52:51,020 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 13:52:51,020 INFO L276 IsEmpty]: Start isEmpty. Operand 21594 states and 56953 transitions. [2021-06-05 13:52:51,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:51,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:51,035 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 13:52:51,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1286 [2021-06-05 13:52:51,236 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:51,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:51,236 INFO L82 PathProgramCache]: Analyzing trace with hash 350890873, now seen corresponding path program 179 times [2021-06-05 13:52:51,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:51,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686391715] [2021-06-05 13:52:51,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:51,338 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 13:52:51,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:51,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686391715] [2021-06-05 13:52:51,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686391715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:51,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993726003] [2021-06-05 13:52:51,338 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 13:52:51,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 13:52:51,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:51,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:51,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:51,609 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 13:52:51,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993726003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:51,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:51,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 23 [2021-06-05 13:52:51,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208030884] [2021-06-05 13:52:51,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:52:51,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:51,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:52:51,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:52:51,610 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 13:52:52,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:52,233 INFO L93 Difference]: Finished difference Result 37416 states and 91139 transitions. [2021-06-05 13:52:52,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:52:52,233 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 13:52:52,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:52,281 INFO L225 Difference]: With dead ends: 37416 [2021-06-05 13:52:52,281 INFO L226 Difference]: Without dead ends: 37416 [2021-06-05 13:52:52,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 357.7ms TimeCoverageRelationStatistics Valid=476, Invalid=784, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:52:52,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37416 states. [2021-06-05 13:52:52,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37416 to 21628. [2021-06-05 13:52:52,635 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 13:52:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21628 states to 21628 states and 57031 transitions. [2021-06-05 13:52:52,669 INFO L78 Accepts]: Start accepts. Automaton has 21628 states and 57031 transitions. Word has length 65 [2021-06-05 13:52:52,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:52,669 INFO L482 AbstractCegarLoop]: Abstraction has 21628 states and 57031 transitions. [2021-06-05 13:52:52,669 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 13:52:52,669 INFO L276 IsEmpty]: Start isEmpty. Operand 21628 states and 57031 transitions. [2021-06-05 13:52:52,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:52,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:52,684 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 13:52:52,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 601 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1287 [2021-06-05 13:52:52,885 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:52,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1339104291, now seen corresponding path program 180 times [2021-06-05 13:52:52,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:52,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478599327] [2021-06-05 13:52:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:52,983 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 13:52:52,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:52,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478599327] [2021-06-05 13:52:52,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478599327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:52,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049927937] [2021-06-05 13:52:52,984 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 13:52:53,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 13:52:53,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:53,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:53,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:53,123 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 13:52:53,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049927937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:53,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:53,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 13:52:53,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244091390] [2021-06-05 13:52:53,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:53,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:53,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:53,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:53,124 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 13:52:53,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:53,559 INFO L93 Difference]: Finished difference Result 33319 states and 81655 transitions. [2021-06-05 13:52:53,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:52:53,560 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 13:52:53,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:53,606 INFO L225 Difference]: With dead ends: 33319 [2021-06-05 13:52:53,607 INFO L226 Difference]: Without dead ends: 33319 [2021-06-05 13:52:53,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:52:53,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33319 states. [2021-06-05 13:52:53,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33319 to 21577. [2021-06-05 13:52:53,948 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 13:52:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21577 states to 21577 states and 56863 transitions. [2021-06-05 13:52:53,983 INFO L78 Accepts]: Start accepts. Automaton has 21577 states and 56863 transitions. Word has length 65 [2021-06-05 13:52:53,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:53,983 INFO L482 AbstractCegarLoop]: Abstraction has 21577 states and 56863 transitions. [2021-06-05 13:52:53,983 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 13:52:53,983 INFO L276 IsEmpty]: Start isEmpty. Operand 21577 states and 56863 transitions. [2021-06-05 13:52:53,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:53,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:53,999 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 13:52:54,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1288,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:54,200 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:54,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:54,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1916575993, now seen corresponding path program 181 times [2021-06-05 13:52:54,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:54,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236802280] [2021-06-05 13:52:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:54,314 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 13:52:54,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:54,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236802280] [2021-06-05 13:52:54,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236802280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:54,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201659499] [2021-06-05 13:52:54,314 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 13:52:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:54,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:54,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:54,452 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 13:52:54,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201659499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:54,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:54,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 13:52:54,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427335708] [2021-06-05 13:52:54,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:52:54,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:54,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:52:54,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:52:54,453 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 13:52:54,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:54,889 INFO L93 Difference]: Finished difference Result 28453 states and 70741 transitions. [2021-06-05 13:52:54,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:52:54,890 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 13:52:54,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:54,918 INFO L225 Difference]: With dead ends: 28453 [2021-06-05 13:52:54,919 INFO L226 Difference]: Without dead ends: 28453 [2021-06-05 13:52:54,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=206, Invalid=346, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:52:54,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28453 states. [2021-06-05 13:52:55,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28453 to 21132. [2021-06-05 13:52:55,209 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 13:52:55,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21132 states to 21132 states and 55594 transitions. [2021-06-05 13:52:55,247 INFO L78 Accepts]: Start accepts. Automaton has 21132 states and 55594 transitions. Word has length 65 [2021-06-05 13:52:55,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:55,247 INFO L482 AbstractCegarLoop]: Abstraction has 21132 states and 55594 transitions. [2021-06-05 13:52:55,247 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 13:52:55,247 INFO L276 IsEmpty]: Start isEmpty. Operand 21132 states and 55594 transitions. [2021-06-05 13:52:55,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:55,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:55,262 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 13:52:55,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1289 [2021-06-05 13:52:55,463 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:55,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:55,463 INFO L82 PathProgramCache]: Analyzing trace with hash 447010829, now seen corresponding path program 372 times [2021-06-05 13:52:55,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:55,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811299976] [2021-06-05 13:52:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:55,575 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 13:52:55,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:55,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811299976] [2021-06-05 13:52:55,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811299976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:55,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892092369] [2021-06-05 13:52:55,575 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 13:52:55,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 13:52:55,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:55,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:52:55,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:55,709 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 13:52:55,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892092369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:55,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:55,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 13:52:55,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405903406] [2021-06-05 13:52:55,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:55,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:55,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:55,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:55,710 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 13:52:55,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:55,998 INFO L93 Difference]: Finished difference Result 25089 states and 62416 transitions. [2021-06-05 13:52:55,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:52:55,998 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 13:52:55,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:56,035 INFO L225 Difference]: With dead ends: 25089 [2021-06-05 13:52:56,035 INFO L226 Difference]: Without dead ends: 25053 [2021-06-05 13:52:56,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 138.9ms TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:52:56,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25053 states. [2021-06-05 13:52:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25053 to 21132. [2021-06-05 13:52:56,349 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 13:52:56,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21132 states to 21132 states and 55585 transitions. [2021-06-05 13:52:56,386 INFO L78 Accepts]: Start accepts. Automaton has 21132 states and 55585 transitions. Word has length 65 [2021-06-05 13:52:56,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:56,387 INFO L482 AbstractCegarLoop]: Abstraction has 21132 states and 55585 transitions. [2021-06-05 13:52:56,387 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 13:52:56,387 INFO L276 IsEmpty]: Start isEmpty. Operand 21132 states and 55585 transitions. [2021-06-05 13:52:56,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:56,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:56,403 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 13:52:56,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1290,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:56,604 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:56,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:56,604 INFO L82 PathProgramCache]: Analyzing trace with hash -749006070, now seen corresponding path program 182 times [2021-06-05 13:52:56,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:56,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907666063] [2021-06-05 13:52:56,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:56,713 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 13:52:56,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:56,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907666063] [2021-06-05 13:52:56,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907666063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:56,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670194099] [2021-06-05 13:52:56,714 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 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 13:52:56,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:56,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:56,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:52:56,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:56,840 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 13:52:56,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670194099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:56,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:56,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:52:56,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418484130] [2021-06-05 13:52:56,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:52:56,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:56,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:52:56,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:52:56,841 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 13:52:57,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:57,576 INFO L93 Difference]: Finished difference Result 23500 states and 60212 transitions. [2021-06-05 13:52:57,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:52:57,577 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 13:52:57,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:57,606 INFO L225 Difference]: With dead ends: 23500 [2021-06-05 13:52:57,606 INFO L226 Difference]: Without dead ends: 23462 [2021-06-05 13:52:57,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:52:57,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23462 states. [2021-06-05 13:52:57,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23462 to 21360. [2021-06-05 13:52:57,879 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 13:52:57,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21360 states to 21360 states and 56148 transitions. [2021-06-05 13:52:57,916 INFO L78 Accepts]: Start accepts. Automaton has 21360 states and 56148 transitions. Word has length 65 [2021-06-05 13:52:57,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:57,916 INFO L482 AbstractCegarLoop]: Abstraction has 21360 states and 56148 transitions. [2021-06-05 13:52:57,916 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 13:52:57,916 INFO L276 IsEmpty]: Start isEmpty. Operand 21360 states and 56148 transitions. [2021-06-05 13:52:57,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:57,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:57,932 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 13:52:58,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1296,605 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:58,132 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:58,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:58,133 INFO L82 PathProgramCache]: Analyzing trace with hash 751326922, now seen corresponding path program 373 times [2021-06-05 13:52:58,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:58,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353685863] [2021-06-05 13:52:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:58,233 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 13:52:58,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:58,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353685863] [2021-06-05 13:52:58,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353685863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:58,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022985141] [2021-06-05 13:52:58,233 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 13:52:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:58,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:52:58,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:58,372 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 13:52:58,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022985141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:58,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:58,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:52:58,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245535971] [2021-06-05 13:52:58,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:52:58,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:58,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:52:58,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:52:58,373 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 13:52:59,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:59,323 INFO L93 Difference]: Finished difference Result 22708 states and 58520 transitions. [2021-06-05 13:52:59,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:52:59,324 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 13:52:59,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:59,349 INFO L225 Difference]: With dead ends: 22708 [2021-06-05 13:52:59,349 INFO L226 Difference]: Without dead ends: 22616 [2021-06-05 13:52:59,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:52:59,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22616 states. [2021-06-05 13:52:59,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22616 to 21349. [2021-06-05 13:52:59,658 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 13:52:59,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21349 states to 21349 states and 56050 transitions. [2021-06-05 13:52:59,696 INFO L78 Accepts]: Start accepts. Automaton has 21349 states and 56050 transitions. Word has length 65 [2021-06-05 13:52:59,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:59,696 INFO L482 AbstractCegarLoop]: Abstraction has 21349 states and 56050 transitions. [2021-06-05 13:52:59,696 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 13:52:59,696 INFO L276 IsEmpty]: Start isEmpty. Operand 21349 states and 56050 transitions. [2021-06-05 13:52:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:52:59,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:59,713 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 13:52:59,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 606 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1297 [2021-06-05 13:52:59,914 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:59,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:59,914 INFO L82 PathProgramCache]: Analyzing trace with hash 137790742, now seen corresponding path program 374 times [2021-06-05 13:52:59,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:59,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651912800] [2021-06-05 13:52:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:00,023 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 13:53:00,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:00,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651912800] [2021-06-05 13:53:00,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651912800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:00,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366854102] [2021-06-05 13:53:00,024 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 13:53:00,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:53:00,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:00,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:53:00,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:00,150 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 13:53:00,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366854102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:00,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:00,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:53:00,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079635878] [2021-06-05 13:53:00,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:53:00,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:00,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:53:00,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:00,151 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 13:53:00,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:00,848 INFO L93 Difference]: Finished difference Result 23448 states and 60119 transitions. [2021-06-05 13:53:00,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:53:00,848 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 13:53:00,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:00,876 INFO L225 Difference]: With dead ends: 23448 [2021-06-05 13:53:00,876 INFO L226 Difference]: Without dead ends: 23436 [2021-06-05 13:53:00,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:53:00,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23436 states. [2021-06-05 13:53:01,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23436 to 21445. [2021-06-05 13:53:01,176 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 13:53:01,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21445 states to 21445 states and 56285 transitions. [2021-06-05 13:53:01,214 INFO L78 Accepts]: Start accepts. Automaton has 21445 states and 56285 transitions. Word has length 65 [2021-06-05 13:53:01,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:01,214 INFO L482 AbstractCegarLoop]: Abstraction has 21445 states and 56285 transitions. [2021-06-05 13:53:01,214 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 13:53:01,214 INFO L276 IsEmpty]: Start isEmpty. Operand 21445 states and 56285 transitions. [2021-06-05 13:53:01,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:01,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:01,230 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 13:53:01,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1298 [2021-06-05 13:53:01,431 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:01,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:01,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1510566761, now seen corresponding path program 375 times [2021-06-05 13:53:01,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:01,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350687111] [2021-06-05 13:53:01,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:01,509 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 13:53:01,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:01,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350687111] [2021-06-05 13:53:01,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350687111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:01,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147208043] [2021-06-05 13:53:01,509 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 13:53:01,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 13:53:01,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:01,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:01,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:01,641 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 13:53:01,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147208043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:01,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:01,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:53:01,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757423608] [2021-06-05 13:53:01,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:53:01,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:01,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:53:01,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:01,642 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 13:53:01,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:01,905 INFO L93 Difference]: Finished difference Result 26049 states and 64269 transitions. [2021-06-05 13:53:01,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:53:01,905 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 13:53:01,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:01,938 INFO L225 Difference]: With dead ends: 26049 [2021-06-05 13:53:01,938 INFO L226 Difference]: Without dead ends: 26031 [2021-06-05 13:53:01,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:01,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26031 states. [2021-06-05 13:53:02,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26031 to 21412. [2021-06-05 13:53:02,219 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 13:53:02,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21412 states to 21412 states and 56153 transitions. [2021-06-05 13:53:02,254 INFO L78 Accepts]: Start accepts. Automaton has 21412 states and 56153 transitions. Word has length 65 [2021-06-05 13:53:02,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:02,254 INFO L482 AbstractCegarLoop]: Abstraction has 21412 states and 56153 transitions. [2021-06-05 13:53:02,254 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 13:53:02,254 INFO L276 IsEmpty]: Start isEmpty. Operand 21412 states and 56153 transitions. [2021-06-05 13:53:02,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:02,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:02,269 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 13:53:02,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1299 [2021-06-05 13:53:02,470 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:02,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:02,470 INFO L82 PathProgramCache]: Analyzing trace with hash -2015259220, now seen corresponding path program 376 times [2021-06-05 13:53:02,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:02,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588425846] [2021-06-05 13:53:02,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:02,580 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 13:53:02,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:02,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588425846] [2021-06-05 13:53:02,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588425846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:02,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974547163] [2021-06-05 13:53:02,580 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 13:53:02,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:53:02,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:02,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:53:02,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:02,812 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 13:53:02,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974547163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:02,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:02,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:53:02,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356599502] [2021-06-05 13:53:02,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:53:02,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:02,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:53:02,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:53:02,813 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 13:53:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:03,742 INFO L93 Difference]: Finished difference Result 25666 states and 64906 transitions. [2021-06-05 13:53:03,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:53:03,743 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 13:53:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:03,774 INFO L225 Difference]: With dead ends: 25666 [2021-06-05 13:53:03,774 INFO L226 Difference]: Without dead ends: 25612 [2021-06-05 13:53:03,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:53:03,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25612 states. [2021-06-05 13:53:04,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25612 to 21675. [2021-06-05 13:53:04,038 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 13:53:04,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21675 states to 21675 states and 56857 transitions. [2021-06-05 13:53:04,076 INFO L78 Accepts]: Start accepts. Automaton has 21675 states and 56857 transitions. Word has length 65 [2021-06-05 13:53:04,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:04,076 INFO L482 AbstractCegarLoop]: Abstraction has 21675 states and 56857 transitions. [2021-06-05 13:53:04,076 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 13:53:04,076 INFO L276 IsEmpty]: Start isEmpty. Operand 21675 states and 56857 transitions. [2021-06-05 13:53:04,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:04,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:04,092 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 13:53:04,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1302 [2021-06-05 13:53:04,292 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:04,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:04,292 INFO L82 PathProgramCache]: Analyzing trace with hash -482700111, now seen corresponding path program 377 times [2021-06-05 13:53:04,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:04,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194650751] [2021-06-05 13:53:04,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:04,378 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 13:53:04,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:04,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194650751] [2021-06-05 13:53:04,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194650751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:04,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855737286] [2021-06-05 13:53:04,378 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 13:53:04,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 13:53:04,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:04,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:04,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:04,541 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 13:53:04,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855737286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:04,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:04,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 18 [2021-06-05 13:53:04,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386969165] [2021-06-05 13:53:04,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:53:04,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:04,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:53:04,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:53:04,542 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 13:53:04,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:04,965 INFO L93 Difference]: Finished difference Result 26526 states and 65340 transitions. [2021-06-05 13:53:04,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:53:04,966 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 13:53:04,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:05,000 INFO L225 Difference]: With dead ends: 26526 [2021-06-05 13:53:05,000 INFO L226 Difference]: Without dead ends: 26502 [2021-06-05 13:53:05,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:53:05,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26502 states. [2021-06-05 13:53:05,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26502 to 21675. [2021-06-05 13:53:05,314 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 13:53:05,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21675 states to 21675 states and 56839 transitions. [2021-06-05 13:53:05,352 INFO L78 Accepts]: Start accepts. Automaton has 21675 states and 56839 transitions. Word has length 65 [2021-06-05 13:53:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:05,352 INFO L482 AbstractCegarLoop]: Abstraction has 21675 states and 56839 transitions. [2021-06-05 13:53:05,352 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 13:53:05,352 INFO L276 IsEmpty]: Start isEmpty. Operand 21675 states and 56839 transitions. [2021-06-05 13:53:05,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:05,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:05,369 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 13:53:05,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1303,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:05,569 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:05,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:05,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1860422686, now seen corresponding path program 378 times [2021-06-05 13:53:05,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:05,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478452801] [2021-06-05 13:53:05,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:05,691 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 13:53:05,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:05,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478452801] [2021-06-05 13:53:05,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478452801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:05,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490680495] [2021-06-05 13:53:05,692 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 13:53:05,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 13:53:05,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:05,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:53:05,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:05,824 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 13:53:05,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490680495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:05,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:05,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:53:05,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785448573] [2021-06-05 13:53:05,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:53:05,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:05,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:53:05,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:53:05,825 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 13:53:07,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:07,051 INFO L93 Difference]: Finished difference Result 30486 states and 75594 transitions. [2021-06-05 13:53:07,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 13:53:07,051 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 13:53:07,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:07,177 INFO L225 Difference]: With dead ends: 30486 [2021-06-05 13:53:07,178 INFO L226 Difference]: Without dead ends: 30306 [2021-06-05 13:53:07,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 469.5ms TimeCoverageRelationStatistics Valid=237, Invalid=1925, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 13:53:07,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30306 states. [2021-06-05 13:53:07,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30306 to 22166. [2021-06-05 13:53:07,479 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 13:53:07,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22166 states to 22166 states and 58118 transitions. [2021-06-05 13:53:07,518 INFO L78 Accepts]: Start accepts. Automaton has 22166 states and 58118 transitions. Word has length 65 [2021-06-05 13:53:07,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:07,518 INFO L482 AbstractCegarLoop]: Abstraction has 22166 states and 58118 transitions. [2021-06-05 13:53:07,518 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 13:53:07,518 INFO L276 IsEmpty]: Start isEmpty. Operand 22166 states and 58118 transitions. [2021-06-05 13:53:07,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:07,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:07,537 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 13:53:07,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1307,611 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:07,737 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:07,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:07,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1473820009, now seen corresponding path program 379 times [2021-06-05 13:53:07,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:07,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938630969] [2021-06-05 13:53:07,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:07,835 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 13:53:07,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:07,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938630969] [2021-06-05 13:53:07,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938630969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:07,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50037707] [2021-06-05 13:53:07,835 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 13:53:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:07,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:07,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:07,961 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 13:53:07,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50037707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:07,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:07,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 13:53:07,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161493309] [2021-06-05 13:53:07,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:53:07,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:07,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:53:07,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:53:07,962 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 13:53:08,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:08,260 INFO L93 Difference]: Finished difference Result 26943 states and 66422 transitions. [2021-06-05 13:53:08,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:53:08,261 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 13:53:08,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:08,298 INFO L225 Difference]: With dead ends: 26943 [2021-06-05 13:53:08,298 INFO L226 Difference]: Without dead ends: 26910 [2021-06-05 13:53:08,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:53:08,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26910 states. [2021-06-05 13:53:08,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26910 to 22166. [2021-06-05 13:53:08,620 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 13:53:08,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22166 states to 22166 states and 58109 transitions. [2021-06-05 13:53:08,659 INFO L78 Accepts]: Start accepts. Automaton has 22166 states and 58109 transitions. Word has length 65 [2021-06-05 13:53:08,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:08,660 INFO L482 AbstractCegarLoop]: Abstraction has 22166 states and 58109 transitions. [2021-06-05 13:53:08,660 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 13:53:08,660 INFO L276 IsEmpty]: Start isEmpty. Operand 22166 states and 58109 transitions. [2021-06-05 13:53:08,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:08,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:08,677 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 13:53:08,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1308 [2021-06-05 13:53:08,878 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:08,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:08,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1920114196, now seen corresponding path program 380 times [2021-06-05 13:53:08,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:08,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048810743] [2021-06-05 13:53:08,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:09,009 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 13:53:09,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:09,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048810743] [2021-06-05 13:53:09,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048810743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:09,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285380772] [2021-06-05 13:53:09,010 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 13:53:09,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:53:09,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:09,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:53:09,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:09,136 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 13:53:09,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285380772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:09,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:09,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:53:09,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478975939] [2021-06-05 13:53:09,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:53:09,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:09,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:53:09,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:09,137 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 13:53:10,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:10,815 INFO L93 Difference]: Finished difference Result 36934 states and 90171 transitions. [2021-06-05 13:53:10,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 13:53:10,816 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 13:53:10,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:10,860 INFO L225 Difference]: With dead ends: 36934 [2021-06-05 13:53:10,861 INFO L226 Difference]: Without dead ends: 36658 [2021-06-05 13:53:10,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 804.4ms TimeCoverageRelationStatistics Valid=507, Invalid=4463, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 13:53:10,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36658 states. [2021-06-05 13:53:11,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36658 to 22558. [2021-06-05 13:53:11,307 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 13:53:11,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22558 states to 22558 states and 59133 transitions. [2021-06-05 13:53:11,346 INFO L78 Accepts]: Start accepts. Automaton has 22558 states and 59133 transitions. Word has length 65 [2021-06-05 13:53:11,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:11,346 INFO L482 AbstractCegarLoop]: Abstraction has 22558 states and 59133 transitions. [2021-06-05 13:53:11,346 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 13:53:11,346 INFO L276 IsEmpty]: Start isEmpty. Operand 22558 states and 59133 transitions. [2021-06-05 13:53:11,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:11,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:11,364 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 13:53:11,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1313 [2021-06-05 13:53:11,564 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:11,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:11,565 INFO L82 PathProgramCache]: Analyzing trace with hash -26541327, now seen corresponding path program 381 times [2021-06-05 13:53:11,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:11,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825390475] [2021-06-05 13:53:11,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:11,673 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 13:53:11,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:11,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825390475] [2021-06-05 13:53:11,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825390475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:11,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627698288] [2021-06-05 13:53:11,673 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 13:53:11,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 13:53:11,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:11,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:11,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:11,802 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 13:53:11,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627698288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:11,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:11,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 13:53:11,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334552467] [2021-06-05 13:53:11,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:53:11,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:11,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:53:11,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:11,803 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 13:53:12,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:12,111 INFO L93 Difference]: Finished difference Result 27397 states and 67556 transitions. [2021-06-05 13:53:12,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:53:12,112 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 13:53:12,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:12,146 INFO L225 Difference]: With dead ends: 27397 [2021-06-05 13:53:12,147 INFO L226 Difference]: Without dead ends: 27355 [2021-06-05 13:53:12,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:53:12,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27355 states. [2021-06-05 13:53:12,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27355 to 22069. [2021-06-05 13:53:12,455 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 13:53:12,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22069 states to 22069 states and 57743 transitions. [2021-06-05 13:53:12,496 INFO L78 Accepts]: Start accepts. Automaton has 22069 states and 57743 transitions. Word has length 65 [2021-06-05 13:53:12,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:12,497 INFO L482 AbstractCegarLoop]: Abstraction has 22069 states and 57743 transitions. [2021-06-05 13:53:12,497 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 13:53:12,497 INFO L276 IsEmpty]: Start isEmpty. Operand 22069 states and 57743 transitions. [2021-06-05 13:53:12,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:12,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:12,514 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 13:53:12,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1314,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:12,715 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:12,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:12,715 INFO L82 PathProgramCache]: Analyzing trace with hash -2073428062, now seen corresponding path program 382 times [2021-06-05 13:53:12,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:12,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3025419] [2021-06-05 13:53:12,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:12,861 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 13:53:12,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:12,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3025419] [2021-06-05 13:53:12,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3025419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:12,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244828334] [2021-06-05 13:53:12,861 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 13:53:12,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:53:12,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:12,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:53:12,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:12,987 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 13:53:12,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244828334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:12,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:12,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 13:53:12,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35430232] [2021-06-05 13:53:12,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:53:12,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:12,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:53:12,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:53:12,988 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 13:53:13,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:13,983 INFO L93 Difference]: Finished difference Result 30333 states and 75005 transitions. [2021-06-05 13:53:13,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:53:13,983 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 13:53:13,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:14,020 INFO L225 Difference]: With dead ends: 30333 [2021-06-05 13:53:14,020 INFO L226 Difference]: Without dead ends: 29955 [2021-06-05 13:53:14,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:53:14,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29955 states. [2021-06-05 13:53:14,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29955 to 20830. [2021-06-05 13:53:14,310 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 13:53:14,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20830 states to 20830 states and 54418 transitions. [2021-06-05 13:53:14,343 INFO L78 Accepts]: Start accepts. Automaton has 20830 states and 54418 transitions. Word has length 65 [2021-06-05 13:53:14,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:14,344 INFO L482 AbstractCegarLoop]: Abstraction has 20830 states and 54418 transitions. [2021-06-05 13:53:14,344 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 13:53:14,344 INFO L276 IsEmpty]: Start isEmpty. Operand 20830 states and 54418 transitions. [2021-06-05 13:53:14,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:14,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:14,360 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 13:53:14,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1320 [2021-06-05 13:53:14,561 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:14,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:14,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1983477717, now seen corresponding path program 183 times [2021-06-05 13:53:14,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:14,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248190143] [2021-06-05 13:53:14,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:14,639 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 13:53:14,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:14,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248190143] [2021-06-05 13:53:14,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248190143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:14,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802663049] [2021-06-05 13:53:14,639 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 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 13:53:14,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 13:53:14,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:14,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:14,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:14,777 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 13:53:14,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802663049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:14,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:14,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:53:14,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000186791] [2021-06-05 13:53:14,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:53:14,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:14,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:53:14,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:53:14,778 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 13:53:15,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:15,128 INFO L93 Difference]: Finished difference Result 26854 states and 66816 transitions. [2021-06-05 13:53:15,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:53:15,129 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 13:53:15,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:15,164 INFO L225 Difference]: With dead ends: 26854 [2021-06-05 13:53:15,164 INFO L226 Difference]: Without dead ends: 26832 [2021-06-05 13:53:15,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:15,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26832 states. [2021-06-05 13:53:15,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26832 to 21370. [2021-06-05 13:53:15,519 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 13:53:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21370 states to 21370 states and 55910 transitions. [2021-06-05 13:53:15,558 INFO L78 Accepts]: Start accepts. Automaton has 21370 states and 55910 transitions. Word has length 65 [2021-06-05 13:53:15,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:15,558 INFO L482 AbstractCegarLoop]: Abstraction has 21370 states and 55910 transitions. [2021-06-05 13:53:15,558 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 13:53:15,558 INFO L276 IsEmpty]: Start isEmpty. Operand 21370 states and 55910 transitions. [2021-06-05 13:53:15,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:15,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:15,573 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 13:53:15,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 616 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1321 [2021-06-05 13:53:15,773 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:15,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:15,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1361597307, now seen corresponding path program 184 times [2021-06-05 13:53:15,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:15,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385397381] [2021-06-05 13:53:15,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:15,857 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 13:53:15,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:15,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385397381] [2021-06-05 13:53:15,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385397381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:15,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691788042] [2021-06-05 13:53:15,857 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 13:53:15,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:53:15,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:15,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:15,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:16,003 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 13:53:16,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691788042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:16,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:16,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:53:16,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208752571] [2021-06-05 13:53:16,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:53:16,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:16,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:53:16,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:53:16,004 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 13:53:16,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:16,420 INFO L93 Difference]: Finished difference Result 33593 states and 82285 transitions. [2021-06-05 13:53:16,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:53:16,420 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 13:53:16,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:16,464 INFO L225 Difference]: With dead ends: 33593 [2021-06-05 13:53:16,465 INFO L226 Difference]: Without dead ends: 33593 [2021-06-05 13:53:16,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:53:16,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33593 states. [2021-06-05 13:53:16,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33593 to 21389. [2021-06-05 13:53:16,803 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 13:53:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21389 states to 21389 states and 55967 transitions. [2021-06-05 13:53:16,840 INFO L78 Accepts]: Start accepts. Automaton has 21389 states and 55967 transitions. Word has length 65 [2021-06-05 13:53:16,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:16,840 INFO L482 AbstractCegarLoop]: Abstraction has 21389 states and 55967 transitions. [2021-06-05 13:53:16,840 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 13:53:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 21389 states and 55967 transitions. [2021-06-05 13:53:16,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:16,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:16,857 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 13:53:17,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1323 [2021-06-05 13:53:17,057 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:17,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:17,057 INFO L82 PathProgramCache]: Analyzing trace with hash -275975149, now seen corresponding path program 185 times [2021-06-05 13:53:17,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:17,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71322599] [2021-06-05 13:53:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:17,144 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 13:53:17,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:17,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71322599] [2021-06-05 13:53:17,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71322599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:17,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655694351] [2021-06-05 13:53:17,145 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 13:53:17,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 13:53:17,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:17,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:17,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:17,393 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 13:53:17,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655694351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:17,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:17,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 24 [2021-06-05 13:53:17,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61652641] [2021-06-05 13:53:17,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:53:17,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:17,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:53:17,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:53:17,394 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 13:53:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:18,069 INFO L93 Difference]: Finished difference Result 38717 states and 94084 transitions. [2021-06-05 13:53:18,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:53:18,070 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 13:53:18,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:18,119 INFO L225 Difference]: With dead ends: 38717 [2021-06-05 13:53:18,119 INFO L226 Difference]: Without dead ends: 38717 [2021-06-05 13:53:18,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 419.8ms TimeCoverageRelationStatistics Valid=617, Invalid=1023, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:53:18,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38717 states. [2021-06-05 13:53:18,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38717 to 21452. [2021-06-05 13:53:18,518 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 13:53:18,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21452 states to 21452 states and 56172 transitions. [2021-06-05 13:53:18,554 INFO L78 Accepts]: Start accepts. Automaton has 21452 states and 56172 transitions. Word has length 65 [2021-06-05 13:53:18,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:18,555 INFO L482 AbstractCegarLoop]: Abstraction has 21452 states and 56172 transitions. [2021-06-05 13:53:18,555 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 13:53:18,555 INFO L276 IsEmpty]: Start isEmpty. Operand 21452 states and 56172 transitions. [2021-06-05 13:53:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:18,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:18,570 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 13:53:18,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1324,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:18,770 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:18,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:18,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1965970313, now seen corresponding path program 186 times [2021-06-05 13:53:18,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:18,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68800180] [2021-06-05 13:53:18,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:18,868 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 13:53:18,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:18,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68800180] [2021-06-05 13:53:18,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68800180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:18,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284798441] [2021-06-05 13:53:18,868 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 13:53:18,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 13:53:18,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:18,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:18,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:19,007 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 13:53:19,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284798441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:19,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:19,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 13:53:19,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068671998] [2021-06-05 13:53:19,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:53:19,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:19,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:53:19,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:19,007 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 13:53:19,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:19,446 INFO L93 Difference]: Finished difference Result 36438 states and 88848 transitions. [2021-06-05 13:53:19,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:53:19,447 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 13:53:19,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:19,503 INFO L225 Difference]: With dead ends: 36438 [2021-06-05 13:53:19,504 INFO L226 Difference]: Without dead ends: 36438 [2021-06-05 13:53:19,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 190.5ms TimeCoverageRelationStatistics Valid=276, Invalid=426, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:53:19,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36438 states. [2021-06-05 13:53:19,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36438 to 21482. [2021-06-05 13:53:19,937 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 13:53:19,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21482 states to 21482 states and 56260 transitions. [2021-06-05 13:53:19,971 INFO L78 Accepts]: Start accepts. Automaton has 21482 states and 56260 transitions. Word has length 65 [2021-06-05 13:53:19,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:19,971 INFO L482 AbstractCegarLoop]: Abstraction has 21482 states and 56260 transitions. [2021-06-05 13:53:19,971 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 13:53:19,971 INFO L276 IsEmpty]: Start isEmpty. Operand 21482 states and 56260 transitions. [2021-06-05 13:53:19,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:19,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:19,986 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 13:53:20,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1325 [2021-06-05 13:53:20,187 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:20,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:20,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1289709971, now seen corresponding path program 187 times [2021-06-05 13:53:20,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:20,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304605695] [2021-06-05 13:53:20,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:20,299 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 13:53:20,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:20,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304605695] [2021-06-05 13:53:20,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304605695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:20,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827007340] [2021-06-05 13:53:20,299 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 13:53:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:20,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:20,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:20,436 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 13:53:20,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827007340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:20,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:20,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 13:53:20,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327226658] [2021-06-05 13:53:20,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:53:20,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:20,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:53:20,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:53:20,437 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 13:53:20,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:20,919 INFO L93 Difference]: Finished difference Result 32841 states and 80457 transitions. [2021-06-05 13:53:20,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:53:20,920 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 13:53:20,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:20,968 INFO L225 Difference]: With dead ends: 32841 [2021-06-05 13:53:20,968 INFO L226 Difference]: Without dead ends: 32841 [2021-06-05 13:53:20,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=290, Invalid=466, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:53:21,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32841 states. [2021-06-05 13:53:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32841 to 21485. [2021-06-05 13:53:21,329 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 13:53:21,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21485 states to 21485 states and 56255 transitions. [2021-06-05 13:53:21,363 INFO L78 Accepts]: Start accepts. Automaton has 21485 states and 56255 transitions. Word has length 65 [2021-06-05 13:53:21,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:21,363 INFO L482 AbstractCegarLoop]: Abstraction has 21485 states and 56255 transitions. [2021-06-05 13:53:21,363 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 13:53:21,363 INFO L276 IsEmpty]: Start isEmpty. Operand 21485 states and 56255 transitions. [2021-06-05 13:53:21,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:21,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:21,378 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 13:53:21,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1326,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:21,579 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:21,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:21,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1985394953, now seen corresponding path program 188 times [2021-06-05 13:53:21,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:21,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034618604] [2021-06-05 13:53:21,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:21,703 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 13:53:21,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:21,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034618604] [2021-06-05 13:53:21,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034618604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:21,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203250589] [2021-06-05 13:53:21,703 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 13:53:21,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:53:21,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:21,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:21,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:21,840 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 13:53:21,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203250589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:21,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:21,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 17 [2021-06-05 13:53:21,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142692247] [2021-06-05 13:53:21,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:53:21,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:21,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:53:21,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:53:21,841 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 13:53:22,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:22,302 INFO L93 Difference]: Finished difference Result 27627 states and 68779 transitions. [2021-06-05 13:53:22,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:53:22,302 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 13:53:22,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:22,339 INFO L225 Difference]: With dead ends: 27627 [2021-06-05 13:53:22,340 INFO L226 Difference]: Without dead ends: 27627 [2021-06-05 13:53:22,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 207.5ms TimeCoverageRelationStatistics Valid=256, Invalid=446, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:53:22,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27627 states. [2021-06-05 13:53:22,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27627 to 20986. [2021-06-05 13:53:22,631 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 13:53:22,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20986 states to 20986 states and 54857 transitions. [2021-06-05 13:53:22,665 INFO L78 Accepts]: Start accepts. Automaton has 20986 states and 54857 transitions. Word has length 65 [2021-06-05 13:53:22,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:22,665 INFO L482 AbstractCegarLoop]: Abstraction has 20986 states and 54857 transitions. [2021-06-05 13:53:22,665 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 13:53:22,665 INFO L276 IsEmpty]: Start isEmpty. Operand 20986 states and 54857 transitions. [2021-06-05 13:53:22,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:22,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:22,681 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 13:53:22,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:22,881 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:22,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:22,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1324010409, now seen corresponding path program 383 times [2021-06-05 13:53:22,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:22,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357690713] [2021-06-05 13:53:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:23,017 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 13:53:23,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:23,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357690713] [2021-06-05 13:53:23,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357690713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:23,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727147516] [2021-06-05 13:53:23,018 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 13:53:23,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 13:53:23,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:23,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:23,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:23,198 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 13:53:23,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727147516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:23,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:23,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 21 [2021-06-05 13:53:23,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273562264] [2021-06-05 13:53:23,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:53:23,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:23,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:53:23,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:53:23,199 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 13:53:23,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:23,644 INFO L93 Difference]: Finished difference Result 25486 states and 62722 transitions. [2021-06-05 13:53:23,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:53:23,644 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 13:53:23,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:23,675 INFO L225 Difference]: With dead ends: 25486 [2021-06-05 13:53:23,675 INFO L226 Difference]: Without dead ends: 25441 [2021-06-05 13:53:23,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:53:23,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25441 states. [2021-06-05 13:53:23,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25441 to 20986. [2021-06-05 13:53:23,951 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 13:53:24,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20986 states to 20986 states and 54848 transitions. [2021-06-05 13:53:24,121 INFO L78 Accepts]: Start accepts. Automaton has 20986 states and 54848 transitions. Word has length 65 [2021-06-05 13:53:24,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:24,121 INFO L482 AbstractCegarLoop]: Abstraction has 20986 states and 54848 transitions. [2021-06-05 13:53:24,121 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 13:53:24,121 INFO L276 IsEmpty]: Start isEmpty. Operand 20986 states and 54848 transitions. [2021-06-05 13:53:24,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:24,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:24,138 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 13:53:24,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1328,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:24,338 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:24,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:24,339 INFO L82 PathProgramCache]: Analyzing trace with hash 626281894, now seen corresponding path program 189 times [2021-06-05 13:53:24,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:24,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111326433] [2021-06-05 13:53:24,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:24,450 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 13:53:24,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:24,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111326433] [2021-06-05 13:53:24,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111326433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:24,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250015816] [2021-06-05 13:53:24,450 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 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 13:53:24,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-06-05 13:53:24,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:24,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:53:24,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:24,587 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 13:53:24,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250015816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:24,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:24,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:53:24,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172262942] [2021-06-05 13:53:24,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:53:24,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:24,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:53:24,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:24,588 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 13:53:25,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:25,316 INFO L93 Difference]: Finished difference Result 23249 states and 59286 transitions. [2021-06-05 13:53:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:53:25,317 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 13:53:25,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:25,344 INFO L225 Difference]: With dead ends: 23249 [2021-06-05 13:53:25,344 INFO L226 Difference]: Without dead ends: 23218 [2021-06-05 13:53:25,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:53:25,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23218 states. [2021-06-05 13:53:25,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23218 to 21247. [2021-06-05 13:53:25,610 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 13:53:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21247 states to 21247 states and 55486 transitions. [2021-06-05 13:53:25,643 INFO L78 Accepts]: Start accepts. Automaton has 21247 states and 55486 transitions. Word has length 65 [2021-06-05 13:53:25,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:25,643 INFO L482 AbstractCegarLoop]: Abstraction has 21247 states and 55486 transitions. [2021-06-05 13:53:25,644 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 13:53:25,644 INFO L276 IsEmpty]: Start isEmpty. Operand 21247 states and 55486 transitions. [2021-06-05 13:53:25,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:25,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:25,659 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 13:53:25,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1335 [2021-06-05 13:53:25,859 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:25,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:25,860 INFO L82 PathProgramCache]: Analyzing trace with hash -927414963, now seen corresponding path program 384 times [2021-06-05 13:53:25,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:25,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768140439] [2021-06-05 13:53:25,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:25,930 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 13:53:25,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:25,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768140439] [2021-06-05 13:53:25,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768140439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:25,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547751450] [2021-06-05 13:53:25,931 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 13:53:25,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 13:53:25,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:25,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:25,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:26,061 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 13:53:26,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547751450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:26,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:26,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 13:53:26,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835303002] [2021-06-05 13:53:26,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:53:26,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:26,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:53:26,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:53:26,062 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 13:53:26,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:26,278 INFO L93 Difference]: Finished difference Result 26072 states and 63936 transitions. [2021-06-05 13:53:26,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:53:26,279 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 13:53:26,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:26,310 INFO L225 Difference]: With dead ends: 26072 [2021-06-05 13:53:26,310 INFO L226 Difference]: Without dead ends: 26069 [2021-06-05 13:53:26,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:26,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26069 states. [2021-06-05 13:53:26,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26069 to 21233. [2021-06-05 13:53:26,608 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 13:53:26,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21233 states to 21233 states and 55429 transitions. [2021-06-05 13:53:26,643 INFO L78 Accepts]: Start accepts. Automaton has 21233 states and 55429 transitions. Word has length 65 [2021-06-05 13:53:26,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:26,643 INFO L482 AbstractCegarLoop]: Abstraction has 21233 states and 55429 transitions. [2021-06-05 13:53:26,643 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 13:53:26,643 INFO L276 IsEmpty]: Start isEmpty. Operand 21233 states and 55429 transitions. [2021-06-05 13:53:26,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:26,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:26,659 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 13:53:26,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1336 [2021-06-05 13:53:26,859 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:26,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:26,860 INFO L82 PathProgramCache]: Analyzing trace with hash -720352397, now seen corresponding path program 385 times [2021-06-05 13:53:26,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:26,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452035156] [2021-06-05 13:53:26,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:26,937 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 13:53:26,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:26,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452035156] [2021-06-05 13:53:26,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452035156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:26,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563867075] [2021-06-05 13:53:26,938 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 13:53:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:26,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:26,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:27,062 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 13:53:27,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563867075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:27,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:27,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:53:27,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209144026] [2021-06-05 13:53:27,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:53:27,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:27,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:53:27,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:27,063 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 13:53:27,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:27,315 INFO L93 Difference]: Finished difference Result 26094 states and 63928 transitions. [2021-06-05 13:53:27,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:53:27,316 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 13:53:27,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:27,349 INFO L225 Difference]: With dead ends: 26094 [2021-06-05 13:53:27,349 INFO L226 Difference]: Without dead ends: 26076 [2021-06-05 13:53:27,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:27,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26076 states. [2021-06-05 13:53:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26076 to 21233. [2021-06-05 13:53:27,657 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 13:53:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21233 states to 21233 states and 55403 transitions. [2021-06-05 13:53:27,692 INFO L78 Accepts]: Start accepts. Automaton has 21233 states and 55403 transitions. Word has length 65 [2021-06-05 13:53:27,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:27,692 INFO L482 AbstractCegarLoop]: Abstraction has 21233 states and 55403 transitions. [2021-06-05 13:53:27,692 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 13:53:27,693 INFO L276 IsEmpty]: Start isEmpty. Operand 21233 states and 55403 transitions. [2021-06-05 13:53:27,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:27,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:27,708 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 13:53:27,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1338,625 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:27,909 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:27,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:27,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2126614886, now seen corresponding path program 386 times [2021-06-05 13:53:27,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:27,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137110869] [2021-06-05 13:53:27,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:28,010 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 13:53:28,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:28,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137110869] [2021-06-05 13:53:28,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137110869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:28,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440144653] [2021-06-05 13:53:28,010 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 13:53:28,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:53:28,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:28,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:53:28,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:28,146 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 13:53:28,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440144653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:28,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:28,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:53:28,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341158613] [2021-06-05 13:53:28,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:53:28,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:28,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:53:28,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:28,147 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 13:53:29,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:29,169 INFO L93 Difference]: Finished difference Result 22551 states and 57719 transitions. [2021-06-05 13:53:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:53:29,170 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 13:53:29,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:29,198 INFO L225 Difference]: With dead ends: 22551 [2021-06-05 13:53:29,198 INFO L226 Difference]: Without dead ends: 22441 [2021-06-05 13:53:29,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:53:29,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22441 states. [2021-06-05 13:53:29,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22441 to 21246. [2021-06-05 13:53:29,484 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 13:53:29,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21246 states to 21246 states and 55339 transitions. [2021-06-05 13:53:29,524 INFO L78 Accepts]: Start accepts. Automaton has 21246 states and 55339 transitions. Word has length 65 [2021-06-05 13:53:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:29,524 INFO L482 AbstractCegarLoop]: Abstraction has 21246 states and 55339 transitions. [2021-06-05 13:53:29,524 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 13:53:29,525 INFO L276 IsEmpty]: Start isEmpty. Operand 21246 states and 55339 transitions. [2021-06-05 13:53:29,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:29,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:29,542 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 13:53:29,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1341 [2021-06-05 13:53:29,742 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:29,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:29,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1513078706, now seen corresponding path program 387 times [2021-06-05 13:53:29,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:29,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591325883] [2021-06-05 13:53:29,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:29,852 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 13:53:29,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:29,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591325883] [2021-06-05 13:53:29,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591325883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:29,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868149800] [2021-06-05 13:53:29,852 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 13:53:29,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-06-05 13:53:29,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:29,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:53:29,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:29,985 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 13:53:29,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868149800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:29,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:29,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:53:29,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105003901] [2021-06-05 13:53:29,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:53:29,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:29,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:53:29,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:29,985 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 13:53:30,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:30,690 INFO L93 Difference]: Finished difference Result 23355 states and 59455 transitions. [2021-06-05 13:53:30,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:53:30,690 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 13:53:30,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:30,716 INFO L225 Difference]: With dead ends: 23355 [2021-06-05 13:53:30,716 INFO L226 Difference]: Without dead ends: 23343 [2021-06-05 13:53:30,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:53:30,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23343 states. [2021-06-05 13:53:30,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23343 to 21366. [2021-06-05 13:53:30,994 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 13:53:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21366 states to 21366 states and 55638 transitions. [2021-06-05 13:53:31,033 INFO L78 Accepts]: Start accepts. Automaton has 21366 states and 55638 transitions. Word has length 65 [2021-06-05 13:53:31,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:31,033 INFO L482 AbstractCegarLoop]: Abstraction has 21366 states and 55638 transitions. [2021-06-05 13:53:31,033 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 13:53:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 21366 states and 55638 transitions. [2021-06-05 13:53:31,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:31,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:31,051 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 13:53:31,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 627 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1342 [2021-06-05 13:53:31,251 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:31,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:31,252 INFO L82 PathProgramCache]: Analyzing trace with hash -639971256, now seen corresponding path program 388 times [2021-06-05 13:53:31,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:31,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119331080] [2021-06-05 13:53:31,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:31,385 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 13:53:31,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:31,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119331080] [2021-06-05 13:53:31,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119331080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:31,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491409266] [2021-06-05 13:53:31,385 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 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 13:53:31,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:53:31,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:31,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:53:31,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:31,522 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 13:53:31,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491409266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:31,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:31,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:53:31,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894664341] [2021-06-05 13:53:31,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:53:31,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:31,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:53:31,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:53:31,523 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 13:53:32,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:32,472 INFO L93 Difference]: Finished difference Result 25787 states and 64793 transitions. [2021-06-05 13:53:32,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:53:32,473 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 13:53:32,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:32,505 INFO L225 Difference]: With dead ends: 25787 [2021-06-05 13:53:32,505 INFO L226 Difference]: Without dead ends: 25733 [2021-06-05 13:53:32,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 310.7ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:53:32,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25733 states. [2021-06-05 13:53:32,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25733 to 21713. [2021-06-05 13:53:32,800 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 13:53:32,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21713 states to 21713 states and 56576 transitions. [2021-06-05 13:53:32,837 INFO L78 Accepts]: Start accepts. Automaton has 21713 states and 56576 transitions. Word has length 65 [2021-06-05 13:53:32,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:32,837 INFO L482 AbstractCegarLoop]: Abstraction has 21713 states and 56576 transitions. [2021-06-05 13:53:32,837 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 13:53:32,837 INFO L276 IsEmpty]: Start isEmpty. Operand 21713 states and 56576 transitions. [2021-06-05 13:53:32,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:32,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:32,852 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 13:53:33,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1343 [2021-06-05 13:53:33,053 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:33,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:33,053 INFO L82 PathProgramCache]: Analyzing trace with hash 892587853, now seen corresponding path program 389 times [2021-06-05 13:53:33,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:33,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976510605] [2021-06-05 13:53:33,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:33,140 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 13:53:33,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:33,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976510605] [2021-06-05 13:53:33,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976510605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:33,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862373552] [2021-06-05 13:53:33,141 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 13:53:33,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 13:53:33,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:33,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:33,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:33,298 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 13:53:33,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862373552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:33,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:33,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 17 [2021-06-05 13:53:33,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857492344] [2021-06-05 13:53:33,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:53:33,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:33,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:53:33,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:53:33,299 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 13:53:33,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:33,703 INFO L93 Difference]: Finished difference Result 26779 states and 65477 transitions. [2021-06-05 13:53:33,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:53:33,704 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 13:53:33,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:33,738 INFO L225 Difference]: With dead ends: 26779 [2021-06-05 13:53:33,739 INFO L226 Difference]: Without dead ends: 26755 [2021-06-05 13:53:33,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:53:33,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26755 states. [2021-06-05 13:53:34,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26755 to 21713. [2021-06-05 13:53:34,107 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 13:53:34,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21713 states to 21713 states and 56558 transitions. [2021-06-05 13:53:34,150 INFO L78 Accepts]: Start accepts. Automaton has 21713 states and 56558 transitions. Word has length 65 [2021-06-05 13:53:34,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:34,150 INFO L482 AbstractCegarLoop]: Abstraction has 21713 states and 56558 transitions. [2021-06-05 13:53:34,150 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 13:53:34,150 INFO L276 IsEmpty]: Start isEmpty. Operand 21713 states and 56558 transitions. [2021-06-05 13:53:34,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:34,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:34,168 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 13:53:34,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1344,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:34,374 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:34,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:34,374 INFO L82 PathProgramCache]: Analyzing trace with hash -485134722, now seen corresponding path program 390 times [2021-06-05 13:53:34,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:34,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721301654] [2021-06-05 13:53:34,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:34,499 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 13:53:34,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:34,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721301654] [2021-06-05 13:53:34,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721301654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:34,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871041077] [2021-06-05 13:53:34,500 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 13:53:34,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-05 13:53:34,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:34,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:53:34,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:34,634 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 13:53:34,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871041077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:34,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:34,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:53:34,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163294823] [2021-06-05 13:53:34,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:53:34,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:34,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:53:34,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:53:34,635 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 13:53:35,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:35,995 INFO L93 Difference]: Finished difference Result 30965 states and 76348 transitions. [2021-06-05 13:53:35,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 13:53:35,996 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 13:53:35,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:36,042 INFO L225 Difference]: With dead ends: 30965 [2021-06-05 13:53:36,042 INFO L226 Difference]: Without dead ends: 30797 [2021-06-05 13:53:36,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 535.9ms TimeCoverageRelationStatistics Valid=285, Invalid=2471, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 13:53:36,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30797 states. [2021-06-05 13:53:36,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30797 to 22408. [2021-06-05 13:53:36,426 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 13:53:36,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22408 states to 22408 states and 58380 transitions. [2021-06-05 13:53:36,467 INFO L78 Accepts]: Start accepts. Automaton has 22408 states and 58380 transitions. Word has length 65 [2021-06-05 13:53:36,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:36,467 INFO L482 AbstractCegarLoop]: Abstraction has 22408 states and 58380 transitions. [2021-06-05 13:53:36,467 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 13:53:36,467 INFO L276 IsEmpty]: Start isEmpty. Operand 22408 states and 58380 transitions. [2021-06-05 13:53:36,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:36,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:36,482 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 13:53:36,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1348,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:36,683 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:36,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:36,683 INFO L82 PathProgramCache]: Analyzing trace with hash -98532045, now seen corresponding path program 391 times [2021-06-05 13:53:36,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:36,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521732402] [2021-06-05 13:53:36,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:36,781 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 13:53:36,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:36,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521732402] [2021-06-05 13:53:36,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521732402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:36,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446037387] [2021-06-05 13:53:36,781 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 13:53:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:36,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:36,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:36,907 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 13:53:36,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446037387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:36,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:36,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 13:53:36,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109482921] [2021-06-05 13:53:36,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:53:36,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:36,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:53:36,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:53:36,908 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 13:53:37,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:37,211 INFO L93 Difference]: Finished difference Result 27475 states and 67252 transitions. [2021-06-05 13:53:37,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:53:37,211 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 13:53:37,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:37,248 INFO L225 Difference]: With dead ends: 27475 [2021-06-05 13:53:37,248 INFO L226 Difference]: Without dead ends: 27442 [2021-06-05 13:53:37,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:53:37,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27442 states. [2021-06-05 13:53:37,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27442 to 22408. [2021-06-05 13:53:37,580 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 13:53:37,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22408 states to 22408 states and 58371 transitions. [2021-06-05 13:53:37,618 INFO L78 Accepts]: Start accepts. Automaton has 22408 states and 58371 transitions. Word has length 65 [2021-06-05 13:53:37,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:37,618 INFO L482 AbstractCegarLoop]: Abstraction has 22408 states and 58371 transitions. [2021-06-05 13:53:37,618 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 13:53:37,618 INFO L276 IsEmpty]: Start isEmpty. Operand 22408 states and 58371 transitions. [2021-06-05 13:53:37,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:37,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:37,634 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 13:53:37,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1349 [2021-06-05 13:53:37,835 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:37,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:37,835 INFO L82 PathProgramCache]: Analyzing trace with hash -544826232, now seen corresponding path program 392 times [2021-06-05 13:53:37,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:37,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429917405] [2021-06-05 13:53:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:37,975 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 13:53:37,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:37,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429917405] [2021-06-05 13:53:37,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429917405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:37,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137333866] [2021-06-05 13:53:37,975 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 13:53:38,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:53:38,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:38,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:53:38,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:38,103 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 13:53:38,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137333866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:38,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:38,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:53:38,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953842255] [2021-06-05 13:53:38,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:53:38,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:38,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:53:38,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:38,104 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 13:53:40,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:40,131 INFO L93 Difference]: Finished difference Result 41984 states and 101118 transitions. [2021-06-05 13:53:40,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 13:53:40,131 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 13:53:40,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:40,181 INFO L225 Difference]: With dead ends: 41984 [2021-06-05 13:53:40,181 INFO L226 Difference]: Without dead ends: 41462 [2021-06-05 13:53:40,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 1061.3ms TimeCoverageRelationStatistics Valid=663, Invalid=6477, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 13:53:40,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41462 states. [2021-06-05 13:53:40,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41462 to 23564. [2021-06-05 13:53:40,592 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 13:53:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23564 states to 23564 states and 61364 transitions. [2021-06-05 13:53:40,627 INFO L78 Accepts]: Start accepts. Automaton has 23564 states and 61364 transitions. Word has length 65 [2021-06-05 13:53:40,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:40,628 INFO L482 AbstractCegarLoop]: Abstraction has 23564 states and 61364 transitions. [2021-06-05 13:53:40,628 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 13:53:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 23564 states and 61364 transitions. [2021-06-05 13:53:40,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:40,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:40,642 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 13:53:40,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 632 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1354 [2021-06-05 13:53:40,843 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:40,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:40,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1348746637, now seen corresponding path program 393 times [2021-06-05 13:53:40,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:40,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247214906] [2021-06-05 13:53:40,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:40,951 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 13:53:40,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:40,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247214906] [2021-06-05 13:53:40,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247214906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:40,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876545978] [2021-06-05 13:53:40,952 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 13:53:40,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 13:53:40,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:40,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:40,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:41,088 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 13:53:41,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876545978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:41,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:41,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 13:53:41,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574187711] [2021-06-05 13:53:41,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:53:41,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:41,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:53:41,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:41,089 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 13:53:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:41,402 INFO L93 Difference]: Finished difference Result 28863 states and 70675 transitions. [2021-06-05 13:53:41,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:53:41,403 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 13:53:41,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:41,444 INFO L225 Difference]: With dead ends: 28863 [2021-06-05 13:53:41,444 INFO L226 Difference]: Without dead ends: 28821 [2021-06-05 13:53:41,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:53:41,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28821 states. [2021-06-05 13:53:41,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28821 to 23564. [2021-06-05 13:53:41,768 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 13:53:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23564 states to 23564 states and 61355 transitions. [2021-06-05 13:53:41,807 INFO L78 Accepts]: Start accepts. Automaton has 23564 states and 61355 transitions. Word has length 65 [2021-06-05 13:53:41,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:41,807 INFO L482 AbstractCegarLoop]: Abstraction has 23564 states and 61355 transitions. [2021-06-05 13:53:41,807 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 13:53:41,807 INFO L276 IsEmpty]: Start isEmpty. Operand 23564 states and 61355 transitions. [2021-06-05 13:53:41,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:41,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:41,823 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 13:53:42,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1355 [2021-06-05 13:53:42,023 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:42,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:42,023 INFO L82 PathProgramCache]: Analyzing trace with hash -698140098, now seen corresponding path program 394 times [2021-06-05 13:53:42,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:42,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547756720] [2021-06-05 13:53:42,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:42,174 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 13:53:42,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:42,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547756720] [2021-06-05 13:53:42,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547756720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:42,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635568373] [2021-06-05 13:53:42,175 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 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 13:53:42,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:53:42,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:42,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:53:42,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:42,300 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 13:53:42,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635568373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:42,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:42,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 13:53:42,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380644960] [2021-06-05 13:53:42,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:53:42,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:42,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:53:42,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:53:42,301 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 13:53:45,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:45,227 INFO L93 Difference]: Finished difference Result 53425 states and 127611 transitions. [2021-06-05 13:53:45,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-06-05 13:53:45,227 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 13:53:45,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:45,299 INFO L225 Difference]: With dead ends: 53425 [2021-06-05 13:53:45,299 INFO L226 Difference]: Without dead ends: 52807 [2021-06-05 13:53:45,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6795 ImplicationChecksByTransitivity, 1830.2ms TimeCoverageRelationStatistics Valid=1473, Invalid=16083, Unknown=0, NotChecked=0, Total=17556 [2021-06-05 13:53:45,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52807 states. [2021-06-05 13:53:45,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52807 to 24483. [2021-06-05 13:53:45,778 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 13:53:45,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24483 states to 24483 states and 63725 transitions. [2021-06-05 13:53:45,818 INFO L78 Accepts]: Start accepts. Automaton has 24483 states and 63725 transitions. Word has length 65 [2021-06-05 13:53:45,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:45,818 INFO L482 AbstractCegarLoop]: Abstraction has 24483 states and 63725 transitions. [2021-06-05 13:53:45,818 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 13:53:45,818 INFO L276 IsEmpty]: Start isEmpty. Operand 24483 states and 63725 transitions. [2021-06-05 13:53:45,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:45,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:45,834 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 13:53:46,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1361,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:46,035 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:46,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:46,035 INFO L82 PathProgramCache]: Analyzing trace with hash 51277555, now seen corresponding path program 395 times [2021-06-05 13:53:46,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:46,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575754404] [2021-06-05 13:53:46,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:46,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:46,159 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 13:53:46,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:46,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575754404] [2021-06-05 13:53:46,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575754404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:46,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381589906] [2021-06-05 13:53:46,160 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 13:53:46,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 13:53:46,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:46,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:46,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:46,336 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 13:53:46,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381589906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:46,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:46,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 20 [2021-06-05 13:53:46,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524721074] [2021-06-05 13:53:46,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:53:46,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:46,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:53:46,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:53:46,337 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 13:53:46,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:46,760 INFO L93 Difference]: Finished difference Result 30034 states and 73553 transitions. [2021-06-05 13:53:46,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:53:46,761 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 13:53:46,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:46,799 INFO L225 Difference]: With dead ends: 30034 [2021-06-05 13:53:46,799 INFO L226 Difference]: Without dead ends: 29983 [2021-06-05 13:53:46,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 203.3ms TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:53:46,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29983 states. [2021-06-05 13:53:47,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29983 to 24023. [2021-06-05 13:53:47,126 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 13:53:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24023 states to 24023 states and 62434 transitions. [2021-06-05 13:53:47,164 INFO L78 Accepts]: Start accepts. Automaton has 24023 states and 62434 transitions. Word has length 65 [2021-06-05 13:53:47,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:47,164 INFO L482 AbstractCegarLoop]: Abstraction has 24023 states and 62434 transitions. [2021-06-05 13:53:47,164 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 13:53:47,164 INFO L276 IsEmpty]: Start isEmpty. Operand 24023 states and 62434 transitions. [2021-06-05 13:53:47,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:47,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:47,180 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 13:53:47,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1362,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:47,380 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:47,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:47,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1773680840, now seen corresponding path program 396 times [2021-06-05 13:53:47,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:47,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438665858] [2021-06-05 13:53:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:47,578 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 13:53:47,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:47,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438665858] [2021-06-05 13:53:47,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438665858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:47,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284014763] [2021-06-05 13:53:47,578 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 13:53:47,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-06-05 13:53:47,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:47,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:53:47,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:47,713 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 13:53:47,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284014763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:47,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:47,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 13:53:47,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238127573] [2021-06-05 13:53:47,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:53:47,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:47,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:53:47,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:53:47,713 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 13:53:48,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:48,865 INFO L93 Difference]: Finished difference Result 34769 states and 84689 transitions. [2021-06-05 13:53:48,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:53:48,865 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 13:53:48,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:48,904 INFO L225 Difference]: With dead ends: 34769 [2021-06-05 13:53:48,904 INFO L226 Difference]: Without dead ends: 33929 [2021-06-05 13:53:48,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 447.2ms TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:53:48,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33929 states. [2021-06-05 13:53:49,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33929 to 20717. [2021-06-05 13:53:49,217 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 13:53:49,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20717 states to 20717 states and 53736 transitions. [2021-06-05 13:53:49,252 INFO L78 Accepts]: Start accepts. Automaton has 20717 states and 53736 transitions. Word has length 65 [2021-06-05 13:53:49,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:49,252 INFO L482 AbstractCegarLoop]: Abstraction has 20717 states and 53736 transitions. [2021-06-05 13:53:49,252 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 13:53:49,252 INFO L276 IsEmpty]: Start isEmpty. Operand 20717 states and 53736 transitions. [2021-06-05 13:53:49,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:49,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:49,268 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 13:53:49,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1369 [2021-06-05 13:53:49,469 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:49,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:49,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1535619323, now seen corresponding path program 190 times [2021-06-05 13:53:49,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:49,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237460325] [2021-06-05 13:53:49,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:49,551 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 13:53:49,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:49,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237460325] [2021-06-05 13:53:49,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237460325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:49,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137545828] [2021-06-05 13:53:49,551 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 13:53:49,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:53:49,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:49,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:49,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:49,789 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 13:53:49,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137545828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:49,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:49,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:53:49,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635643739] [2021-06-05 13:53:49,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:53:49,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:49,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:53:49,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:53:49,789 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 13:53:50,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:50,070 INFO L93 Difference]: Finished difference Result 25901 states and 64415 transitions. [2021-06-05 13:53:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:53:50,070 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 13:53:50,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:50,102 INFO L225 Difference]: With dead ends: 25901 [2021-06-05 13:53:50,102 INFO L226 Difference]: Without dead ends: 25881 [2021-06-05 13:53:50,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:50,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25881 states. [2021-06-05 13:53:50,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25881 to 21398. [2021-06-05 13:53:50,399 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 13:53:50,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21398 states to 21398 states and 55600 transitions. [2021-06-05 13:53:50,434 INFO L78 Accepts]: Start accepts. Automaton has 21398 states and 55600 transitions. Word has length 65 [2021-06-05 13:53:50,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:50,434 INFO L482 AbstractCegarLoop]: Abstraction has 21398 states and 55600 transitions. [2021-06-05 13:53:50,434 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 13:53:50,434 INFO L276 IsEmpty]: Start isEmpty. Operand 21398 states and 55600 transitions. [2021-06-05 13:53:50,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:50,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:50,450 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 13:53:50,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1370,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:50,650 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:50,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:50,650 INFO L82 PathProgramCache]: Analyzing trace with hash 913738913, now seen corresponding path program 191 times [2021-06-05 13:53:50,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:50,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13733360] [2021-06-05 13:53:50,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:50,729 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 13:53:50,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:50,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13733360] [2021-06-05 13:53:50,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13733360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:50,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110708161] [2021-06-05 13:53:50,729 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 13:53:50,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 13:53:50,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:50,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:50,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:50,985 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 13:53:50,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110708161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:50,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:50,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22] total 24 [2021-06-05 13:53:50,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141760952] [2021-06-05 13:53:50,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:53:50,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:50,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:53:50,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=365, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:53:50,986 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 13:53:51,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:51,738 INFO L93 Difference]: Finished difference Result 34523 states and 84310 transitions. [2021-06-05 13:53:51,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:53:51,738 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 13:53:51,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:51,782 INFO L225 Difference]: With dead ends: 34523 [2021-06-05 13:53:51,782 INFO L226 Difference]: Without dead ends: 34523 [2021-06-05 13:53:51,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 392.5ms TimeCoverageRelationStatistics Valid=591, Invalid=891, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:53:51,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34523 states. [2021-06-05 13:53:52,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34523 to 21413. [2021-06-05 13:53:52,138 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 13:53:52,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21413 states to 21413 states and 55645 transitions. [2021-06-05 13:53:52,173 INFO L78 Accepts]: Start accepts. Automaton has 21413 states and 55645 transitions. Word has length 65 [2021-06-05 13:53:52,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:52,173 INFO L482 AbstractCegarLoop]: Abstraction has 21413 states and 55645 transitions. [2021-06-05 13:53:52,173 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 13:53:52,173 INFO L276 IsEmpty]: Start isEmpty. Operand 21413 states and 55645 transitions. [2021-06-05 13:53:52,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:52,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:52,188 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 13:53:52,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1372,638 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:52,389 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:52,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:52,389 INFO L82 PathProgramCache]: Analyzing trace with hash -723833543, now seen corresponding path program 192 times [2021-06-05 13:53:52,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:52,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262852115] [2021-06-05 13:53:52,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:52,481 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 13:53:52,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:52,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262852115] [2021-06-05 13:53:52,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262852115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:52,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212441624] [2021-06-05 13:53:52,481 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 13:53:52,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 13:53:52,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:52,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:52,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:52,623 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 13:53:52,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212441624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:52,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:52,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 13:53:52,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633273067] [2021-06-05 13:53:52,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:53:52,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:52,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:53:52,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:53:52,624 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 13:53:53,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:53,069 INFO L93 Difference]: Finished difference Result 36708 states and 89413 transitions. [2021-06-05 13:53:53,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:53:53,069 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 13:53:53,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:53,114 INFO L225 Difference]: With dead ends: 36708 [2021-06-05 13:53:53,114 INFO L226 Difference]: Without dead ends: 36708 [2021-06-05 13:53:53,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 179.8ms TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:53:53,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36708 states. [2021-06-05 13:53:53,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36708 to 21464. [2021-06-05 13:53:53,486 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 13:53:53,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21464 states to 21464 states and 55810 transitions. [2021-06-05 13:53:53,523 INFO L78 Accepts]: Start accepts. Automaton has 21464 states and 55810 transitions. Word has length 65 [2021-06-05 13:53:53,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:53,524 INFO L482 AbstractCegarLoop]: Abstraction has 21464 states and 55810 transitions. [2021-06-05 13:53:53,524 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 13:53:53,524 INFO L276 IsEmpty]: Start isEmpty. Operand 21464 states and 55810 transitions. [2021-06-05 13:53:53,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:53,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:53,540 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 13:53:53,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1373,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:53,740 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:53,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:53,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1881138589, now seen corresponding path program 193 times [2021-06-05 13:53:53,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:53,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723169186] [2021-06-05 13:53:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:53,839 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 13:53:53,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:53,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723169186] [2021-06-05 13:53:53,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723169186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:53,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638372886] [2021-06-05 13:53:53,839 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 13:53:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:53,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:53,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:53,970 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 13:53:53,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638372886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:53,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:53,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 13:53:53,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787020966] [2021-06-05 13:53:53,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:53:53,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:53,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:53:53,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:53,971 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 13:53:54,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:54,517 INFO L93 Difference]: Finished difference Result 37797 states and 91974 transitions. [2021-06-05 13:53:54,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:53:54,518 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 13:53:54,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:54,574 INFO L225 Difference]: With dead ends: 37797 [2021-06-05 13:53:54,574 INFO L226 Difference]: Without dead ends: 37797 [2021-06-05 13:53:54,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 271.7ms TimeCoverageRelationStatistics Valid=338, Invalid=532, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:53:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37797 states. [2021-06-05 13:53:54,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37797 to 21524. [2021-06-05 13:53:54,949 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 13:53:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21524 states to 21524 states and 56002 transitions. [2021-06-05 13:53:54,983 INFO L78 Accepts]: Start accepts. Automaton has 21524 states and 56002 transitions. Word has length 65 [2021-06-05 13:53:54,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:54,983 INFO L482 AbstractCegarLoop]: Abstraction has 21524 states and 56002 transitions. [2021-06-05 13:53:54,983 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 13:53:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 21524 states and 56002 transitions. [2021-06-05 13:53:54,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:54,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:54,998 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 13:53:55,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1374 [2021-06-05 13:53:55,198 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:55,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:55,199 INFO L82 PathProgramCache]: Analyzing trace with hash 841851577, now seen corresponding path program 194 times [2021-06-05 13:53:55,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:55,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906887341] [2021-06-05 13:53:55,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:55,311 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 13:53:55,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:55,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906887341] [2021-06-05 13:53:55,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906887341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:55,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406896126] [2021-06-05 13:53:55,312 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 13:53:55,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:53:55,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:55,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:55,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:55,452 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 13:53:55,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406896126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:55,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:55,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 13:53:55,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255941125] [2021-06-05 13:53:55,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:53:55,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:55,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:53:55,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:53:55,453 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 13:53:55,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:55,993 INFO L93 Difference]: Finished difference Result 36105 states and 88048 transitions. [2021-06-05 13:53:55,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:53:55,994 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 13:53:55,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:56,042 INFO L225 Difference]: With dead ends: 36105 [2021-06-05 13:53:56,043 INFO L226 Difference]: Without dead ends: 36105 [2021-06-05 13:53:56,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=381, Invalid=611, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:53:56,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36105 states. [2021-06-05 13:53:56,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36105 to 21553. [2021-06-05 13:53:56,430 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 13:53:56,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21553 states to 21553 states and 56085 transitions. [2021-06-05 13:53:56,465 INFO L78 Accepts]: Start accepts. Automaton has 21553 states and 56085 transitions. Word has length 65 [2021-06-05 13:53:56,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:56,466 INFO L482 AbstractCegarLoop]: Abstraction has 21553 states and 56085 transitions. [2021-06-05 13:53:56,466 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 13:53:56,466 INFO L276 IsEmpty]: Start isEmpty. Operand 21553 states and 56085 transitions. [2021-06-05 13:53:56,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:56,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:56,483 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 13:53:56,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1375 [2021-06-05 13:53:56,683 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:56,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:56,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1861713949, now seen corresponding path program 195 times [2021-06-05 13:53:56,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:56,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383709098] [2021-06-05 13:53:56,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:56,809 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 13:53:56,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:56,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383709098] [2021-06-05 13:53:56,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383709098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:56,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481487266] [2021-06-05 13:53:56,810 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 13:53:56,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 13:53:56,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:56,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:53:56,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:57,015 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 13:53:57,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481487266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:57,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:57,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 22 [2021-06-05 13:53:57,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383745576] [2021-06-05 13:53:57,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:53:57,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:57,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:53:57,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:53:57,016 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 13:53:57,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:57,510 INFO L93 Difference]: Finished difference Result 25993 states and 64689 transitions. [2021-06-05 13:53:57,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:53:57,510 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 13:53:57,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:57,546 INFO L225 Difference]: With dead ends: 25993 [2021-06-05 13:53:57,546 INFO L226 Difference]: Without dead ends: 25993 [2021-06-05 13:53:57,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 253.5ms TimeCoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:53:57,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25993 states. [2021-06-05 13:53:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25993 to 20708. [2021-06-05 13:53:57,833 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 13:53:57,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20708 states to 20708 states and 53740 transitions. [2021-06-05 13:53:57,866 INFO L78 Accepts]: Start accepts. Automaton has 20708 states and 53740 transitions. Word has length 65 [2021-06-05 13:53:57,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:57,866 INFO L482 AbstractCegarLoop]: Abstraction has 20708 states and 53740 transitions. [2021-06-05 13:53:57,866 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 13:53:57,866 INFO L276 IsEmpty]: Start isEmpty. Operand 20708 states and 53740 transitions. [2021-06-05 13:53:57,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:57,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:57,882 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 13:53:58,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 642 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1376 [2021-06-05 13:53:58,082 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:58,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:58,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1855519693, now seen corresponding path program 397 times [2021-06-05 13:53:58,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:58,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381649541] [2021-06-05 13:53:58,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:58,217 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 13:53:58,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:58,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381649541] [2021-06-05 13:53:58,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381649541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:58,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947416208] [2021-06-05 13:53:58,217 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 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 13:53:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:58,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:53:58,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:58,348 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 13:53:58,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947416208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:58,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:58,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 13:53:58,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157676538] [2021-06-05 13:53:58,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:53:58,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:58,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:53:58,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:53:58,349 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 13:53:58,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:58,681 INFO L93 Difference]: Finished difference Result 25213 states and 61593 transitions. [2021-06-05 13:53:58,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:53:58,681 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 13:53:58,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:58,713 INFO L225 Difference]: With dead ends: 25213 [2021-06-05 13:53:58,713 INFO L226 Difference]: Without dead ends: 25159 [2021-06-05 13:53:58,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:53:58,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25159 states. [2021-06-05 13:53:59,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25159 to 20708. [2021-06-05 13:53:59,047 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 13:53:59,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20708 states to 20708 states and 53731 transitions. [2021-06-05 13:53:59,079 INFO L78 Accepts]: Start accepts. Automaton has 20708 states and 53731 transitions. Word has length 65 [2021-06-05 13:53:59,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:59,079 INFO L482 AbstractCegarLoop]: Abstraction has 20708 states and 53731 transitions. [2021-06-05 13:53:59,079 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 13:53:59,079 INFO L276 IsEmpty]: Start isEmpty. Operand 20708 states and 53731 transitions. [2021-06-05 13:53:59,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:53:59,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:59,095 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 13:53:59,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1379 [2021-06-05 13:53:59,295 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:59,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:59,295 INFO L82 PathProgramCache]: Analyzing trace with hash 2136980874, now seen corresponding path program 196 times [2021-06-05 13:53:59,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:59,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697026794] [2021-06-05 13:53:59,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:59,403 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 13:53:59,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:59,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697026794] [2021-06-05 13:53:59,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697026794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:59,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291227374] [2021-06-05 13:53:59,404 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 13:53:59,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:53:59,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:59,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:53:59,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:59,529 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 13:53:59,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291227374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:59,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:59,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:53:59,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804669234] [2021-06-05 13:53:59,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:53:59,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:59,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:53:59,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:59,530 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 13:54:00,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:00,206 INFO L93 Difference]: Finished difference Result 22901 states and 58040 transitions. [2021-06-05 13:54:00,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:54:00,207 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 13:54:00,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:00,233 INFO L225 Difference]: With dead ends: 22901 [2021-06-05 13:54:00,233 INFO L226 Difference]: Without dead ends: 22879 [2021-06-05 13:54:00,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:54:00,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22879 states. [2021-06-05 13:54:00,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22879 to 21011. [2021-06-05 13:54:00,526 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 13:54:00,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21011 states to 21011 states and 54466 transitions. [2021-06-05 13:54:00,560 INFO L78 Accepts]: Start accepts. Automaton has 21011 states and 54466 transitions. Word has length 65 [2021-06-05 13:54:00,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:00,560 INFO L482 AbstractCegarLoop]: Abstraction has 21011 states and 54466 transitions. [2021-06-05 13:54:00,560 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 13:54:00,560 INFO L276 IsEmpty]: Start isEmpty. Operand 21011 states and 54466 transitions. [2021-06-05 13:54:00,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:00,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:00,577 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 13:54:00,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 644 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1387 [2021-06-05 13:54:00,778 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:00,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:00,778 INFO L82 PathProgramCache]: Analyzing trace with hash -657653430, now seen corresponding path program 398 times [2021-06-05 13:54:00,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:00,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879740043] [2021-06-05 13:54:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:00,878 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 13:54:00,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:00,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879740043] [2021-06-05 13:54:00,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879740043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:00,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470613170] [2021-06-05 13:54:00,878 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 13:54:00,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:00,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:00,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:54:00,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:01,013 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 13:54:01,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470613170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:01,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:01,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:54:01,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203948270] [2021-06-05 13:54:01,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:01,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:01,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:01,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:01,014 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 13:54:01,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:01,986 INFO L93 Difference]: Finished difference Result 22325 states and 56767 transitions. [2021-06-05 13:54:01,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:54:01,987 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 13:54:01,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:02,015 INFO L225 Difference]: With dead ends: 22325 [2021-06-05 13:54:02,015 INFO L226 Difference]: Without dead ends: 22197 [2021-06-05 13:54:02,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:54:02,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22197 states. [2021-06-05 13:54:02,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22197 to 21057. [2021-06-05 13:54:02,285 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 13:54:02,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21057 states to 21057 states and 54445 transitions. [2021-06-05 13:54:02,316 INFO L78 Accepts]: Start accepts. Automaton has 21057 states and 54445 transitions. Word has length 65 [2021-06-05 13:54:02,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:02,316 INFO L482 AbstractCegarLoop]: Abstraction has 21057 states and 54445 transitions. [2021-06-05 13:54:02,316 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 13:54:02,317 INFO L276 IsEmpty]: Start isEmpty. Operand 21057 states and 54445 transitions. [2021-06-05 13:54:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:02,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:02,331 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 13:54:02,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1388 [2021-06-05 13:54:02,532 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:02,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:02,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1271189610, now seen corresponding path program 399 times [2021-06-05 13:54:02,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:02,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072290031] [2021-06-05 13:54:02,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:02,662 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 13:54:02,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:02,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072290031] [2021-06-05 13:54:02,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072290031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:02,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444555095] [2021-06-05 13:54:02,662 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 13:54:02,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 13:54:02,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:02,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:54:02,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:02,803 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 13:54:02,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444555095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:02,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:02,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:54:02,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134866344] [2021-06-05 13:54:02,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:02,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:02,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:02,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:02,804 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 13:54:03,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:03,493 INFO L93 Difference]: Finished difference Result 23159 states and 58564 transitions. [2021-06-05 13:54:03,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:54:03,494 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 13:54:03,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:03,522 INFO L225 Difference]: With dead ends: 23159 [2021-06-05 13:54:03,522 INFO L226 Difference]: Without dead ends: 23147 [2021-06-05 13:54:03,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:54:03,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23147 states. [2021-06-05 13:54:03,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23147 to 21201. [2021-06-05 13:54:03,871 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 13:54:03,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21201 states to 21201 states and 54809 transitions. [2021-06-05 13:54:03,905 INFO L78 Accepts]: Start accepts. Automaton has 21201 states and 54809 transitions. Word has length 65 [2021-06-05 13:54:03,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:03,905 INFO L482 AbstractCegarLoop]: Abstraction has 21201 states and 54809 transitions. [2021-06-05 13:54:03,905 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 13:54:03,906 INFO L276 IsEmpty]: Start isEmpty. Operand 21201 states and 54809 transitions. [2021-06-05 13:54:03,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:03,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:03,921 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 13:54:04,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 646 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1389 [2021-06-05 13:54:04,122 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:04,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:04,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1428489097, now seen corresponding path program 197 times [2021-06-05 13:54:04,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:04,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601982781] [2021-06-05 13:54:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:04,201 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 13:54:04,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:04,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601982781] [2021-06-05 13:54:04,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601982781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:04,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257255071] [2021-06-05 13:54:04,201 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 13:54:04,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 13:54:04,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:04,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:54:04,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:04,384 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 13:54:04,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257255071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:04,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:04,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 21 [2021-06-05 13:54:04,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562201219] [2021-06-05 13:54:04,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:54:04,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:04,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:54:04,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:54:04,385 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 13:54:04,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:04,834 INFO L93 Difference]: Finished difference Result 25604 states and 63733 transitions. [2021-06-05 13:54:04,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:54:04,834 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 13:54:04,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:04,864 INFO L225 Difference]: With dead ends: 25604 [2021-06-05 13:54:04,864 INFO L226 Difference]: Without dead ends: 25574 [2021-06-05 13:54:04,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:54:04,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25574 states. [2021-06-05 13:54:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25574 to 21847. [2021-06-05 13:54:05,166 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 13:54:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21847 states to 21847 states and 56548 transitions. [2021-06-05 13:54:05,202 INFO L78 Accepts]: Start accepts. Automaton has 21847 states and 56548 transitions. Word has length 65 [2021-06-05 13:54:05,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:05,202 INFO L482 AbstractCegarLoop]: Abstraction has 21847 states and 56548 transitions. [2021-06-05 13:54:05,203 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 13:54:05,203 INFO L276 IsEmpty]: Start isEmpty. Operand 21847 states and 56548 transitions. [2021-06-05 13:54:05,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:05,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:05,220 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 13:54:05,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1390,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:05,421 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:05,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:05,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1375420183, now seen corresponding path program 400 times [2021-06-05 13:54:05,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:05,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567412737] [2021-06-05 13:54:05,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:05,503 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 13:54:05,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:05,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567412737] [2021-06-05 13:54:05,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567412737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:05,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634247086] [2021-06-05 13:54:05,503 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 13:54:05,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:05,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:05,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:54:05,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:05,628 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 13:54:05,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634247086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:05,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:05,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:54:05,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435081432] [2021-06-05 13:54:05,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:05,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:05,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:05,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:05,629 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 13:54:05,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:05,863 INFO L93 Difference]: Finished difference Result 26845 states and 65318 transitions. [2021-06-05 13:54:05,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:05,864 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 13:54:05,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:05,897 INFO L225 Difference]: With dead ends: 26845 [2021-06-05 13:54:05,897 INFO L226 Difference]: Without dead ends: 26827 [2021-06-05 13:54:05,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:54:05,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26827 states. [2021-06-05 13:54:06,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26827 to 21826. [2021-06-05 13:54:06,205 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 13:54:06,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21826 states to 21826 states and 56456 transitions. [2021-06-05 13:54:06,242 INFO L78 Accepts]: Start accepts. Automaton has 21826 states and 56456 transitions. Word has length 65 [2021-06-05 13:54:06,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:06,242 INFO L482 AbstractCegarLoop]: Abstraction has 21826 states and 56456 transitions. [2021-06-05 13:54:06,242 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 13:54:06,242 INFO L276 IsEmpty]: Start isEmpty. Operand 21826 states and 56456 transitions. [2021-06-05 13:54:06,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:06,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:06,259 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 13:54:06,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1393,648 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:06,459 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:06,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:06,459 INFO L82 PathProgramCache]: Analyzing trace with hash 870727724, now seen corresponding path program 401 times [2021-06-05 13:54:06,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:06,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841689603] [2021-06-05 13:54:06,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:06,567 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 13:54:06,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:06,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841689603] [2021-06-05 13:54:06,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841689603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:06,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511489337] [2021-06-05 13:54:06,567 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 13:54:06,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 13:54:06,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:06,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:54:06,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:06,702 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 13:54:06,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511489337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:06,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:06,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:54:06,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94695093] [2021-06-05 13:54:06,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:54:06,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:06,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:54:06,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:06,703 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 13:54:07,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:07,693 INFO L93 Difference]: Finished difference Result 26191 states and 65578 transitions. [2021-06-05 13:54:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 13:54:07,693 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 13:54:07,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:07,726 INFO L225 Difference]: With dead ends: 26191 [2021-06-05 13:54:07,726 INFO L226 Difference]: Without dead ends: 26137 [2021-06-05 13:54:07,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 314.2ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:54:07,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26137 states. [2021-06-05 13:54:08,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26137 to 22289. [2021-06-05 13:54:08,040 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 13:54:08,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22289 states to 22289 states and 57714 transitions. [2021-06-05 13:54:08,082 INFO L78 Accepts]: Start accepts. Automaton has 22289 states and 57714 transitions. Word has length 65 [2021-06-05 13:54:08,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:08,082 INFO L482 AbstractCegarLoop]: Abstraction has 22289 states and 57714 transitions. [2021-06-05 13:54:08,082 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 13:54:08,082 INFO L276 IsEmpty]: Start isEmpty. Operand 22289 states and 57714 transitions. [2021-06-05 13:54:08,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:08,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:08,100 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 13:54:08,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 649 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1396 [2021-06-05 13:54:08,300 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:08,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:08,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1891680463, now seen corresponding path program 402 times [2021-06-05 13:54:08,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:08,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387247393] [2021-06-05 13:54:08,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:08,391 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 13:54:08,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:08,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387247393] [2021-06-05 13:54:08,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387247393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:08,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592322950] [2021-06-05 13:54:08,391 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 13:54:08,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 13:54:08,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:08,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:54:08,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:08,525 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 13:54:08,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592322950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:08,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:08,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 13:54:08,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330025614] [2021-06-05 13:54:08,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:54:08,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:08,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:54:08,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:08,526 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 13:54:08,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:08,843 INFO L93 Difference]: Finished difference Result 27384 states and 66666 transitions. [2021-06-05 13:54:08,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:08,843 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 13:54:08,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:08,877 INFO L225 Difference]: With dead ends: 27384 [2021-06-05 13:54:08,877 INFO L226 Difference]: Without dead ends: 27360 [2021-06-05 13:54:08,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:54:08,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27360 states. [2021-06-05 13:54:09,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27360 to 22289. [2021-06-05 13:54:09,199 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 13:54:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22289 states to 22289 states and 57697 transitions. [2021-06-05 13:54:09,237 INFO L78 Accepts]: Start accepts. Automaton has 22289 states and 57697 transitions. Word has length 65 [2021-06-05 13:54:09,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:09,237 INFO L482 AbstractCegarLoop]: Abstraction has 22289 states and 57697 transitions. [2021-06-05 13:54:09,237 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 13:54:09,237 INFO L276 IsEmpty]: Start isEmpty. Operand 22289 states and 57697 transitions. [2021-06-05 13:54:09,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:09,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:09,252 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 13:54:09,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 650 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1397 [2021-06-05 13:54:09,453 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:09,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1025564258, now seen corresponding path program 403 times [2021-06-05 13:54:09,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:09,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610290541] [2021-06-05 13:54:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:09,574 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 13:54:09,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:09,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610290541] [2021-06-05 13:54:09,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610290541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:09,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846925874] [2021-06-05 13:54:09,575 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 13:54:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:09,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:54:09,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:09,704 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 13:54:09,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846925874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:09,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:09,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:54:09,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883192932] [2021-06-05 13:54:09,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:54:09,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:09,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:54:09,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:54:09,705 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 13:54:11,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:11,202 INFO L93 Difference]: Finished difference Result 31771 states and 78106 transitions. [2021-06-05 13:54:11,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 13:54:11,202 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 13:54:11,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:11,240 INFO L225 Difference]: With dead ends: 31771 [2021-06-05 13:54:11,240 INFO L226 Difference]: Without dead ends: 31603 [2021-06-05 13:54:11,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 600.8ms TimeCoverageRelationStatistics Valid=333, Invalid=3089, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 13:54:11,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31603 states. [2021-06-05 13:54:11,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31603 to 23236. [2021-06-05 13:54:11,583 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 13:54:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23236 states to 23236 states and 60190 transitions. [2021-06-05 13:54:11,622 INFO L78 Accepts]: Start accepts. Automaton has 23236 states and 60190 transitions. Word has length 65 [2021-06-05 13:54:11,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:11,622 INFO L482 AbstractCegarLoop]: Abstraction has 23236 states and 60190 transitions. [2021-06-05 13:54:11,622 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 13:54:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 23236 states and 60190 transitions. [2021-06-05 13:54:11,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:11,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:11,638 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 13:54:11,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1401 [2021-06-05 13:54:11,838 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:11,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:11,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1412166935, now seen corresponding path program 404 times [2021-06-05 13:54:11,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:11,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969382710] [2021-06-05 13:54:11,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:11,941 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 13:54:11,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:11,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969382710] [2021-06-05 13:54:11,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969382710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:11,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988576304] [2021-06-05 13:54:11,942 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 13:54:11,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:11,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:11,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:54:11,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:12,073 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 13:54:12,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988576304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:12,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:12,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 13:54:12,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394926319] [2021-06-05 13:54:12,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:54:12,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:12,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:54:12,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:54:12,074 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 13:54:12,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:12,353 INFO L93 Difference]: Finished difference Result 28515 states and 69490 transitions. [2021-06-05 13:54:12,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:54:12,353 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 13:54:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:12,390 INFO L225 Difference]: With dead ends: 28515 [2021-06-05 13:54:12,390 INFO L226 Difference]: Without dead ends: 28482 [2021-06-05 13:54:12,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:54:12,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28482 states. [2021-06-05 13:54:12,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28482 to 23236. [2021-06-05 13:54:12,731 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 13:54:12,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23236 states to 23236 states and 60181 transitions. [2021-06-05 13:54:12,769 INFO L78 Accepts]: Start accepts. Automaton has 23236 states and 60181 transitions. Word has length 65 [2021-06-05 13:54:12,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:12,769 INFO L482 AbstractCegarLoop]: Abstraction has 23236 states and 60181 transitions. [2021-06-05 13:54:12,769 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 13:54:12,769 INFO L276 IsEmpty]: Start isEmpty. Operand 23236 states and 60181 transitions. [2021-06-05 13:54:12,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:12,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:12,785 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 13:54:12,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1402 [2021-06-05 13:54:12,986 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:12,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:12,986 INFO L82 PathProgramCache]: Analyzing trace with hash 965872748, now seen corresponding path program 405 times [2021-06-05 13:54:12,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:12,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555316630] [2021-06-05 13:54:12,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:13,117 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 13:54:13,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:13,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555316630] [2021-06-05 13:54:13,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555316630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:13,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663446946] [2021-06-05 13:54:13,117 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 13:54:13,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 13:54:13,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:13,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:54:13,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:13,248 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 13:54:13,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663446946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:13,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:13,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:54:13,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194202259] [2021-06-05 13:54:13,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:54:13,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:13,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:54:13,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:54:13,249 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 13:54:15,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:15,602 INFO L93 Difference]: Finished difference Result 43429 states and 104578 transitions. [2021-06-05 13:54:15,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 13:54:15,602 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 13:54:15,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:15,653 INFO L225 Difference]: With dead ends: 43429 [2021-06-05 13:54:15,653 INFO L226 Difference]: Without dead ends: 42973 [2021-06-05 13:54:15,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3483 ImplicationChecksByTransitivity, 1193.0ms TimeCoverageRelationStatistics Valid=819, Invalid=8883, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 13:54:15,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42973 states. [2021-06-05 13:54:16,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42973 to 24902. [2021-06-05 13:54:16,079 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 13:54:16,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24902 states to 24902 states and 64511 transitions. [2021-06-05 13:54:16,120 INFO L78 Accepts]: Start accepts. Automaton has 24902 states and 64511 transitions. Word has length 65 [2021-06-05 13:54:16,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:16,120 INFO L482 AbstractCegarLoop]: Abstraction has 24902 states and 64511 transitions. [2021-06-05 13:54:16,120 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 13:54:16,120 INFO L276 IsEmpty]: Start isEmpty. Operand 24902 states and 64511 transitions. [2021-06-05 13:54:16,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:16,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:16,135 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 13:54:16,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1407,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:16,336 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:16,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:16,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1435521679, now seen corresponding path program 406 times [2021-06-05 13:54:16,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:16,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011970993] [2021-06-05 13:54:16,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:16,444 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 13:54:16,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:16,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011970993] [2021-06-05 13:54:16,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011970993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:16,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86181869] [2021-06-05 13:54:16,444 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 13:54:16,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:16,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:16,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:54:16,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:16,569 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 13:54:16,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86181869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:16,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:16,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 13:54:16,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765048708] [2021-06-05 13:54:16,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:54:16,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:16,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:54:16,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:54:16,570 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 13:54:16,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:16,919 INFO L93 Difference]: Finished difference Result 30490 states and 74400 transitions. [2021-06-05 13:54:16,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:54:16,920 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 13:54:16,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:16,966 INFO L225 Difference]: With dead ends: 30490 [2021-06-05 13:54:16,966 INFO L226 Difference]: Without dead ends: 30448 [2021-06-05 13:54:16,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:54:16,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30448 states. [2021-06-05 13:54:17,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30448 to 24902. [2021-06-05 13:54:17,364 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 13:54:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24902 states to 24902 states and 64502 transitions. [2021-06-05 13:54:17,409 INFO L78 Accepts]: Start accepts. Automaton has 24902 states and 64502 transitions. Word has length 65 [2021-06-05 13:54:17,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:17,409 INFO L482 AbstractCegarLoop]: Abstraction has 24902 states and 64502 transitions. [2021-06-05 13:54:17,409 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 13:54:17,409 INFO L276 IsEmpty]: Start isEmpty. Operand 24902 states and 64502 transitions. [2021-06-05 13:54:17,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:17,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:17,427 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 13:54:17,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1408,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:17,627 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:17,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:17,628 INFO L82 PathProgramCache]: Analyzing trace with hash 812558882, now seen corresponding path program 407 times [2021-06-05 13:54:17,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:17,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652360867] [2021-06-05 13:54:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:17,774 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 13:54:17,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:17,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652360867] [2021-06-05 13:54:17,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652360867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:17,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631989888] [2021-06-05 13:54:17,775 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 13:54:17,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 13:54:17,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:17,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:54:17,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:17,908 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 13:54:17,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631989888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:17,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:17,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 13:54:17,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745333948] [2021-06-05 13:54:17,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:54:17,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:17,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:54:17,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:54:17,909 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 13:54:21,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:21,556 INFO L93 Difference]: Finished difference Result 69310 states and 163134 transitions. [2021-06-05 13:54:21,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-06-05 13:54:21,556 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 13:54:21,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:21,649 INFO L225 Difference]: With dead ends: 69310 [2021-06-05 13:54:21,649 INFO L226 Difference]: Without dead ends: 67924 [2021-06-05 13:54:21,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10744 ImplicationChecksByTransitivity, 2402.5ms TimeCoverageRelationStatistics Valid=1953, Invalid=24453, Unknown=0, NotChecked=0, Total=26406 [2021-06-05 13:54:21,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67924 states. [2021-06-05 13:54:22,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67924 to 27517. [2021-06-05 13:54:22,281 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 13:54:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27517 states to 27517 states and 71255 transitions. [2021-06-05 13:54:22,325 INFO L78 Accepts]: Start accepts. Automaton has 27517 states and 71255 transitions. Word has length 65 [2021-06-05 13:54:22,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:22,326 INFO L482 AbstractCegarLoop]: Abstraction has 27517 states and 71255 transitions. [2021-06-05 13:54:22,326 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 13:54:22,326 INFO L276 IsEmpty]: Start isEmpty. Operand 27517 states and 71255 transitions. [2021-06-05 13:54:22,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:22,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:22,342 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 13:54:22,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1414,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:22,543 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:22,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:22,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1561976535, now seen corresponding path program 408 times [2021-06-05 13:54:22,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:22,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982029699] [2021-06-05 13:54:22,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:22,665 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 13:54:22,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:22,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982029699] [2021-06-05 13:54:22,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982029699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:22,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603004830] [2021-06-05 13:54:22,665 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 13:54:22,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 13:54:22,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:22,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:54:22,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:22,796 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 13:54:22,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603004830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:22,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:22,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 13:54:22,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602898644] [2021-06-05 13:54:22,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:54:22,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:22,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:54:22,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:54:22,796 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 13:54:23,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:23,116 INFO L93 Difference]: Finished difference Result 33599 states and 82086 transitions. [2021-06-05 13:54:23,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:54:23,116 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 13:54:23,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:23,158 INFO L225 Difference]: With dead ends: 33599 [2021-06-05 13:54:23,158 INFO L226 Difference]: Without dead ends: 33548 [2021-06-05 13:54:23,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:54:23,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33548 states. [2021-06-05 13:54:23,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33548 to 27517. [2021-06-05 13:54:23,542 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 13:54:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27517 states to 27517 states and 71246 transitions. [2021-06-05 13:54:23,587 INFO L78 Accepts]: Start accepts. Automaton has 27517 states and 71246 transitions. Word has length 65 [2021-06-05 13:54:23,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:23,587 INFO L482 AbstractCegarLoop]: Abstraction has 27517 states and 71246 transitions. [2021-06-05 13:54:23,587 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 13:54:23,587 INFO L276 IsEmpty]: Start isEmpty. Operand 27517 states and 71246 transitions. [2021-06-05 13:54:23,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:23,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:23,742 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 13:54:23,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 656 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1415 [2021-06-05 13:54:23,943 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:23,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:23,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1010587476, now seen corresponding path program 409 times [2021-06-05 13:54:23,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:23,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743206446] [2021-06-05 13:54:23,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:24,100 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 13:54:24,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:24,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743206446] [2021-06-05 13:54:24,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743206446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:24,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125501278] [2021-06-05 13:54:24,101 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 13:54:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:24,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:54:24,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:24,225 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 13:54:24,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125501278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:24,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:24,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 13:54:24,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083622179] [2021-06-05 13:54:24,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:54:24,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:24,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:54:24,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:24,226 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 13:54:30,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:30,023 INFO L93 Difference]: Finished difference Result 88601 states and 209190 transitions. [2021-06-05 13:54:30,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2021-06-05 13:54:30,024 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 13:54:30,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:30,141 INFO L225 Difference]: With dead ends: 88601 [2021-06-05 13:54:30,141 INFO L226 Difference]: Without dead ends: 87281 [2021-06-05 13:54:30,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29314 ImplicationChecksByTransitivity, 4423.6ms TimeCoverageRelationStatistics Valid=4383, Invalid=62439, Unknown=0, NotChecked=0, Total=66822 [2021-06-05 13:54:30,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87281 states. [2021-06-05 13:54:31,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87281 to 29787. [2021-06-05 13:54:31,036 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 13:54:31,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29787 states to 29787 states and 77039 transitions. [2021-06-05 13:54:31,087 INFO L78 Accepts]: Start accepts. Automaton has 29787 states and 77039 transitions. Word has length 65 [2021-06-05 13:54:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:31,087 INFO L482 AbstractCegarLoop]: Abstraction has 29787 states and 77039 transitions. [2021-06-05 13:54:31,087 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 13:54:31,087 INFO L276 IsEmpty]: Start isEmpty. Operand 29787 states and 77039 transitions. [2021-06-05 13:54:31,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:31,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:31,103 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 13:54:31,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1422 [2021-06-05 13:54:31,304 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:31,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:31,304 INFO L82 PathProgramCache]: Analyzing trace with hash -928748623, now seen corresponding path program 410 times [2021-06-05 13:54:31,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:31,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673641700] [2021-06-05 13:54:31,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:31,439 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 13:54:31,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:31,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673641700] [2021-06-05 13:54:31,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673641700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:31,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162776623] [2021-06-05 13:54:31,439 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 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 13:54:31,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:31,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:31,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:54:31,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:31,568 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 13:54:31,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162776623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:31,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:31,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 13:54:31,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288946145] [2021-06-05 13:54:31,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:54:31,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:31,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:54:31,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:31,569 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 13:54:32,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:32,001 INFO L93 Difference]: Finished difference Result 36048 states and 88237 transitions. [2021-06-05 13:54:32,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:54:32,002 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 13:54:32,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:32,043 INFO L225 Difference]: With dead ends: 36048 [2021-06-05 13:54:32,043 INFO L226 Difference]: Without dead ends: 35988 [2021-06-05 13:54:32,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 186.2ms TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:54:32,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35988 states. [2021-06-05 13:54:32,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35988 to 29354. [2021-06-05 13:54:32,444 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 13:54:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29354 states to 29354 states and 75841 transitions. [2021-06-05 13:54:32,492 INFO L78 Accepts]: Start accepts. Automaton has 29354 states and 75841 transitions. Word has length 65 [2021-06-05 13:54:32,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:32,492 INFO L482 AbstractCegarLoop]: Abstraction has 29354 states and 75841 transitions. [2021-06-05 13:54:32,492 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 13:54:32,492 INFO L276 IsEmpty]: Start isEmpty. Operand 29354 states and 75841 transitions. [2021-06-05 13:54:32,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:32,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:32,508 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 13:54:32,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1423 [2021-06-05 13:54:32,709 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:32,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:32,709 INFO L82 PathProgramCache]: Analyzing trace with hash -207313438, now seen corresponding path program 411 times [2021-06-05 13:54:32,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:32,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156938675] [2021-06-05 13:54:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:32,879 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 13:54:32,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:32,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156938675] [2021-06-05 13:54:32,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156938675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:32,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789136568] [2021-06-05 13:54:32,880 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 13:54:32,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-06-05 13:54:32,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:32,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:54:32,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:33,011 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 13:54:33,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789136568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:33,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:33,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-05 13:54:33,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240739360] [2021-06-05 13:54:33,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:54:33,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:33,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:54:33,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:54:33,011 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 13:54:34,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:34,195 INFO L93 Difference]: Finished difference Result 42805 states and 102748 transitions. [2021-06-05 13:54:34,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:54:34,196 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 13:54:34,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:34,245 INFO L225 Difference]: With dead ends: 42805 [2021-06-05 13:54:34,245 INFO L226 Difference]: Without dead ends: 41023 [2021-06-05 13:54:34,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 484.4ms TimeCoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 13:54:34,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41023 states. [2021-06-05 13:54:34,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41023 to 21413. [2021-06-05 13:54:34,618 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 13:54:34,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21413 states to 21413 states and 55207 transitions. [2021-06-05 13:54:34,652 INFO L78 Accepts]: Start accepts. Automaton has 21413 states and 55207 transitions. Word has length 65 [2021-06-05 13:54:34,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:34,652 INFO L482 AbstractCegarLoop]: Abstraction has 21413 states and 55207 transitions. [2021-06-05 13:54:34,652 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 13:54:34,652 INFO L276 IsEmpty]: Start isEmpty. Operand 21413 states and 55207 transitions. [2021-06-05 13:54:34,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:34,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:34,667 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 13:54:34,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 659 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1431 [2021-06-05 13:54:34,867 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:34,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:34,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1067255365, now seen corresponding path program 198 times [2021-06-05 13:54:34,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:34,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293866289] [2021-06-05 13:54:34,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:34,948 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 13:54:34,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:34,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293866289] [2021-06-05 13:54:34,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293866289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:34,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408436703] [2021-06-05 13:54:34,949 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 13:54:34,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-05 13:54:34,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:34,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:54:34,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:35,089 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 13:54:35,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408436703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:35,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:35,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 13:54:35,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000259217] [2021-06-05 13:54:35,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:54:35,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:35,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:54:35,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:35,090 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 13:54:35,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:35,487 INFO L93 Difference]: Finished difference Result 31342 states and 77017 transitions. [2021-06-05 13:54:35,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:54:35,488 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 13:54:35,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:35,528 INFO L225 Difference]: With dead ends: 31342 [2021-06-05 13:54:35,528 INFO L226 Difference]: Without dead ends: 31342 [2021-06-05 13:54:35,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:54:35,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31342 states. [2021-06-05 13:54:35,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31342 to 21689. [2021-06-05 13:54:35,871 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 13:54:35,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21689 states to 21689 states and 56038 transitions. [2021-06-05 13:54:35,905 INFO L78 Accepts]: Start accepts. Automaton has 21689 states and 56038 transitions. Word has length 65 [2021-06-05 13:54:35,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:35,905 INFO L482 AbstractCegarLoop]: Abstraction has 21689 states and 56038 transitions. [2021-06-05 13:54:35,905 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 13:54:35,905 INFO L276 IsEmpty]: Start isEmpty. Operand 21689 states and 56038 transitions. [2021-06-05 13:54:35,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:35,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:35,920 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 13:54:36,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 660 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1432 [2021-06-05 13:54:36,121 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:36,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1590139475, now seen corresponding path program 199 times [2021-06-05 13:54:36,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:36,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488918774] [2021-06-05 13:54:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:36,220 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 13:54:36,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:36,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488918774] [2021-06-05 13:54:36,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488918774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:36,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010570512] [2021-06-05 13:54:36,221 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 13:54:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:36,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:54:36,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:36,367 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-06-05 13:54:36,458 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 13:54:36,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010570512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:36,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:36,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 13:54:36,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157462598] [2021-06-05 13:54:36,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:54:36,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:36,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:54:36,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:54:36,459 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 13:54:36,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:36,941 INFO L93 Difference]: Finished difference Result 35356 states and 86322 transitions. [2021-06-05 13:54:36,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:54:36,942 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 13:54:36,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:36,994 INFO L225 Difference]: With dead ends: 35356 [2021-06-05 13:54:36,994 INFO L226 Difference]: Without dead ends: 35356 [2021-06-05 13:54:36,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 207.4ms TimeCoverageRelationStatistics Valid=296, Invalid=460, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:54:37,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35356 states. [2021-06-05 13:54:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35356 to 21737. [2021-06-05 13:54:37,386 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 13:54:37,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21737 states to 21737 states and 56179 transitions. [2021-06-05 13:54:37,420 INFO L78 Accepts]: Start accepts. Automaton has 21737 states and 56179 transitions. Word has length 65 [2021-06-05 13:54:37,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:37,420 INFO L482 AbstractCegarLoop]: Abstraction has 21737 states and 56179 transitions. [2021-06-05 13:54:37,420 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 13:54:37,420 INFO L276 IsEmpty]: Start isEmpty. Operand 21737 states and 56179 transitions. [2021-06-05 13:54:37,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:37,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:37,435 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 13:54:37,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1433,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:37,636 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:37,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:37,636 INFO L82 PathProgramCache]: Analyzing trace with hash -99855689, now seen corresponding path program 200 times [2021-06-05 13:54:37,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:37,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604007781] [2021-06-05 13:54:37,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:37,740 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 13:54:37,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:37,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604007781] [2021-06-05 13:54:37,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604007781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:37,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625660449] [2021-06-05 13:54:37,740 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 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 13:54:37,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:37,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:37,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:54:37,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:37,876 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 13:54:37,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625660449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:37,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:37,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 13:54:37,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167157998] [2021-06-05 13:54:37,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:54:37,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:37,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:54:37,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:54:37,877 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 13:54:38,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:38,456 INFO L93 Difference]: Finished difference Result 37231 states and 90722 transitions. [2021-06-05 13:54:38,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:54:38,456 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 13:54:38,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:38,504 INFO L225 Difference]: With dead ends: 37231 [2021-06-05 13:54:38,504 INFO L226 Difference]: Without dead ends: 37231 [2021-06-05 13:54:38,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 257.8ms TimeCoverageRelationStatistics Valid=403, Invalid=653, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:54:38,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37231 states. [2021-06-05 13:54:38,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37231 to 21806. [2021-06-05 13:54:38,891 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 13:54:38,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21806 states to 21806 states and 56383 transitions. [2021-06-05 13:54:38,926 INFO L78 Accepts]: Start accepts. Automaton has 21806 states and 56383 transitions. Word has length 65 [2021-06-05 13:54:38,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:38,926 INFO L482 AbstractCegarLoop]: Abstraction has 21806 states and 56383 transitions. [2021-06-05 13:54:38,926 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 13:54:38,927 INFO L276 IsEmpty]: Start isEmpty. Operand 21806 states and 56383 transitions. [2021-06-05 13:54:38,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:38,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:38,942 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 13:54:39,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 662 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1434 [2021-06-05 13:54:39,142 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:39,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:39,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1139142701, now seen corresponding path program 201 times [2021-06-05 13:54:39,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:39,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455638086] [2021-06-05 13:54:39,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:39,262 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 13:54:39,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:39,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455638086] [2021-06-05 13:54:39,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455638086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:39,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695233182] [2021-06-05 13:54:39,262 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 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 13:54:39,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-06-05 13:54:39,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:39,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:54:39,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:39,404 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 13:54:39,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695233182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:39,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:39,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 13:54:39,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332913647] [2021-06-05 13:54:39,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:54:39,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:39,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:54:39,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:54:39,405 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 13:54:40,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:40,052 INFO L93 Difference]: Finished difference Result 37033 states and 90316 transitions. [2021-06-05 13:54:40,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:54:40,053 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 13:54:40,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:40,106 INFO L225 Difference]: With dead ends: 37033 [2021-06-05 13:54:40,107 INFO L226 Difference]: Without dead ends: 37033 [2021-06-05 13:54:40,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 304.2ms TimeCoverageRelationStatistics Valid=478, Invalid=782, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:54:40,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37033 states. [2021-06-05 13:54:40,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37033 to 21884. [2021-06-05 13:54:40,477 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 13:54:40,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21884 states to 21884 states and 56614 transitions. [2021-06-05 13:54:40,515 INFO L78 Accepts]: Start accepts. Automaton has 21884 states and 56614 transitions. Word has length 65 [2021-06-05 13:54:40,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:40,515 INFO L482 AbstractCegarLoop]: Abstraction has 21884 states and 56614 transitions. [2021-06-05 13:54:40,515 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 13:54:40,515 INFO L276 IsEmpty]: Start isEmpty. Operand 21884 states and 56614 transitions. [2021-06-05 13:54:40,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:40,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:40,532 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 13:54:40,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1435,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:40,732 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:40,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:40,732 INFO L82 PathProgramCache]: Analyzing trace with hash -119280329, now seen corresponding path program 202 times [2021-06-05 13:54:40,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:40,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806018577] [2021-06-05 13:54:40,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:40,970 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 13:54:40,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:40,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806018577] [2021-06-05 13:54:40,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806018577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:40,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103701358] [2021-06-05 13:54:40,970 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 13:54:41,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:41,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:41,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:54:41,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:41,112 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 13:54:41,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103701358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:41,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:41,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 17 [2021-06-05 13:54:41,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152667713] [2021-06-05 13:54:41,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:54:41,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:41,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:54:41,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:41,113 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 13:54:41,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:41,782 INFO L93 Difference]: Finished difference Result 34831 states and 85232 transitions. [2021-06-05 13:54:41,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:54:41,782 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 13:54:41,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:41,826 INFO L225 Difference]: With dead ends: 34831 [2021-06-05 13:54:41,826 INFO L226 Difference]: Without dead ends: 34831 [2021-06-05 13:54:41,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 431.2ms TimeCoverageRelationStatistics Valid=503, Invalid=829, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:54:41,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34831 states. [2021-06-05 13:54:42,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34831 to 21919. [2021-06-05 13:54:42,167 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 13:54:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21919 states to 21919 states and 56722 transitions. [2021-06-05 13:54:42,201 INFO L78 Accepts]: Start accepts. Automaton has 21919 states and 56722 transitions. Word has length 65 [2021-06-05 13:54:42,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:42,201 INFO L482 AbstractCegarLoop]: Abstraction has 21919 states and 56722 transitions. [2021-06-05 13:54:42,201 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 13:54:42,201 INFO L276 IsEmpty]: Start isEmpty. Operand 21919 states and 56722 transitions. [2021-06-05 13:54:42,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:42,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:42,217 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 13:54:42,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1436 [2021-06-05 13:54:42,417 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:42,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:42,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1992019, now seen corresponding path program 203 times [2021-06-05 13:54:42,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:42,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152498814] [2021-06-05 13:54:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:42,560 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 13:54:42,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:42,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152498814] [2021-06-05 13:54:42,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152498814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:42,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046875276] [2021-06-05 13:54:42,561 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 13:54:42,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-06-05 13:54:42,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:42,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:54:42,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:42,920 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 13:54:42,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046875276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:42,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:42,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 36 [2021-06-05 13:54:42,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417987973] [2021-06-05 13:54:42,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 13:54:42,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:42,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 13:54:42,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:54:42,921 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 13:54:43,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:43,961 INFO L93 Difference]: Finished difference Result 31459 states and 77242 transitions. [2021-06-05 13:54:43,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 13:54:43,961 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 13:54:43,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:44,000 INFO L225 Difference]: With dead ends: 31459 [2021-06-05 13:54:44,000 INFO L226 Difference]: Without dead ends: 31459 [2021-06-05 13:54:44,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 660.3ms TimeCoverageRelationStatistics Valid=1021, Invalid=2285, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 13:54:44,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31459 states. [2021-06-05 13:54:44,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31459 to 21939. [2021-06-05 13:54:44,326 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 13:54:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21939 states to 21939 states and 56789 transitions. [2021-06-05 13:54:44,358 INFO L78 Accepts]: Start accepts. Automaton has 21939 states and 56789 transitions. Word has length 65 [2021-06-05 13:54:44,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:44,358 INFO L482 AbstractCegarLoop]: Abstraction has 21939 states and 56789 transitions. [2021-06-05 13:54:44,358 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 13:54:44,358 INFO L276 IsEmpty]: Start isEmpty. Operand 21939 states and 56789 transitions. [2021-06-05 13:54:44,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:44,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:44,372 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 13:54:44,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1437,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:44,573 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:44,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:44,573 INFO L82 PathProgramCache]: Analyzing trace with hash 759015351, now seen corresponding path program 204 times [2021-06-05 13:54:44,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:44,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196672404] [2021-06-05 13:54:44,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:44,728 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 13:54:44,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:44,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196672404] [2021-06-05 13:54:44,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196672404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:44,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468098809] [2021-06-05 13:54:44,728 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 13:54:44,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-05 13:54:44,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:44,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:54:44,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:44,873 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 13:54:44,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468098809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:44,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:44,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 19 [2021-06-05 13:54:44,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050376986] [2021-06-05 13:54:44,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:54:44,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:44,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:54:44,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:54:44,874 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 13:54:45,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:45,462 INFO L93 Difference]: Finished difference Result 26303 states and 65783 transitions. [2021-06-05 13:54:45,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:54:45,462 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 13:54:45,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:45,496 INFO L225 Difference]: With dead ends: 26303 [2021-06-05 13:54:45,496 INFO L226 Difference]: Without dead ends: 26303 [2021-06-05 13:54:45,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 293.8ms TimeCoverageRelationStatistics Valid=371, Invalid=685, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:54:45,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26303 states. [2021-06-05 13:54:45,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26303 to 21121. [2021-06-05 13:54:45,870 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 13:54:45,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21121 states to 21121 states and 54587 transitions. [2021-06-05 13:54:45,903 INFO L78 Accepts]: Start accepts. Automaton has 21121 states and 54587 transitions. Word has length 65 [2021-06-05 13:54:45,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:45,903 INFO L482 AbstractCegarLoop]: Abstraction has 21121 states and 54587 transitions. [2021-06-05 13:54:45,903 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 13:54:45,903 INFO L276 IsEmpty]: Start isEmpty. Operand 21121 states and 54587 transitions. [2021-06-05 13:54:45,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:45,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:45,918 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 13:54:46,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1438 [2021-06-05 13:54:46,118 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:46,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:46,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2028042391, now seen corresponding path program 412 times [2021-06-05 13:54:46,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:46,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825433639] [2021-06-05 13:54:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:46,267 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 13:54:46,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:46,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825433639] [2021-06-05 13:54:46,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825433639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:46,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767685598] [2021-06-05 13:54:46,267 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 13:54:46,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:46,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:46,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:54:46,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:46,399 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 13:54:46,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767685598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:46,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:46,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 13:54:46,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682434453] [2021-06-05 13:54:46,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:54:46,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:46,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:54:46,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:54:46,400 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 13:54:46,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:46,829 INFO L93 Difference]: Finished difference Result 25725 states and 62650 transitions. [2021-06-05 13:54:46,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:54:46,829 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 13:54:46,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:46,863 INFO L225 Difference]: With dead ends: 25725 [2021-06-05 13:54:46,864 INFO L226 Difference]: Without dead ends: 25662 [2021-06-05 13:54:46,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 215.5ms TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:54:46,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25662 states. [2021-06-05 13:54:47,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25662 to 21121. [2021-06-05 13:54:47,162 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 13:54:47,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21121 states to 21121 states and 54578 transitions. [2021-06-05 13:54:47,195 INFO L78 Accepts]: Start accepts. Automaton has 21121 states and 54578 transitions. Word has length 65 [2021-06-05 13:54:47,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:47,195 INFO L482 AbstractCegarLoop]: Abstraction has 21121 states and 54578 transitions. [2021-06-05 13:54:47,195 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 13:54:47,195 INFO L276 IsEmpty]: Start isEmpty. Operand 21121 states and 54578 transitions. [2021-06-05 13:54:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:47,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:47,213 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 13:54:47,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1439,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:47,414 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:47,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:47,414 INFO L82 PathProgramCache]: Analyzing trace with hash 407999270, now seen corresponding path program 205 times [2021-06-05 13:54:47,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:47,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184879764] [2021-06-05 13:54:47,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:47,528 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 13:54:47,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:47,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184879764] [2021-06-05 13:54:47,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184879764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:47,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674283262] [2021-06-05 13:54:47,529 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 13:54:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:47,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:54:47,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:47,661 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 13:54:47,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674283262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:47,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:47,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:54:47,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113716443] [2021-06-05 13:54:47,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:47,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:47,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:47,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:47,662 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 13:54:48,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:48,412 INFO L93 Difference]: Finished difference Result 23217 states and 58673 transitions. [2021-06-05 13:54:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:54:48,412 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 13:54:48,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:48,440 INFO L225 Difference]: With dead ends: 23217 [2021-06-05 13:54:48,440 INFO L226 Difference]: Without dead ends: 23202 [2021-06-05 13:54:48,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:54:48,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23202 states. [2021-06-05 13:54:48,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23202 to 21457. [2021-06-05 13:54:48,725 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 13:54:48,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21457 states to 21457 states and 55372 transitions. [2021-06-05 13:54:48,762 INFO L78 Accepts]: Start accepts. Automaton has 21457 states and 55372 transitions. Word has length 65 [2021-06-05 13:54:48,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:48,762 INFO L482 AbstractCegarLoop]: Abstraction has 21457 states and 55372 transitions. [2021-06-05 13:54:48,762 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 13:54:48,762 INFO L276 IsEmpty]: Start isEmpty. Operand 21457 states and 55372 transitions. [2021-06-05 13:54:48,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:48,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:48,779 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 13:54:48,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1448,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:48,979 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:48,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:48,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1908332262, now seen corresponding path program 413 times [2021-06-05 13:54:48,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:48,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880831914] [2021-06-05 13:54:48,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:49,106 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 13:54:49,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:49,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880831914] [2021-06-05 13:54:49,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880831914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:49,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128972298] [2021-06-05 13:54:49,107 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 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 13:54:49,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 13:54:49,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:49,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:54:49,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:49,268 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 13:54:49,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128972298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:49,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:49,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:54:49,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829579585] [2021-06-05 13:54:49,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:49,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:49,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:49,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:49,269 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 13:54:50,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:50,254 INFO L93 Difference]: Finished difference Result 22759 states and 57640 transitions. [2021-06-05 13:54:50,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:54:50,254 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 13:54:50,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:50,281 INFO L225 Difference]: With dead ends: 22759 [2021-06-05 13:54:50,281 INFO L226 Difference]: Without dead ends: 22613 [2021-06-05 13:54:50,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:54:50,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22613 states. [2021-06-05 13:54:50,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22613 to 21545. [2021-06-05 13:54:50,555 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 13:54:50,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21545 states to 21545 states and 55413 transitions. [2021-06-05 13:54:50,589 INFO L78 Accepts]: Start accepts. Automaton has 21545 states and 55413 transitions. Word has length 65 [2021-06-05 13:54:50,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:50,590 INFO L482 AbstractCegarLoop]: Abstraction has 21545 states and 55413 transitions. [2021-06-05 13:54:50,590 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 13:54:50,590 INFO L276 IsEmpty]: Start isEmpty. Operand 21545 states and 55413 transitions. [2021-06-05 13:54:50,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:50,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:50,606 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 13:54:50,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1449 [2021-06-05 13:54:50,807 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:50,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:50,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1294796082, now seen corresponding path program 414 times [2021-06-05 13:54:50,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:50,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551081284] [2021-06-05 13:54:50,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:50,945 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 13:54:51,026 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 13:54:51,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:51,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551081284] [2021-06-05 13:54:51,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551081284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:51,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102133870] [2021-06-05 13:54:51,026 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 13:54:51,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 13:54:51,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:51,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:54:51,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:51,159 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 13:54:51,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102133870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:51,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:51,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:54:51,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89208552] [2021-06-05 13:54:51,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:51,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:51,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:51,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:51,160 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 13:54:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:51,860 INFO L93 Difference]: Finished difference Result 23561 states and 59381 transitions. [2021-06-05 13:54:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:54:51,861 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 13:54:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:51,887 INFO L225 Difference]: With dead ends: 23561 [2021-06-05 13:54:51,887 INFO L226 Difference]: Without dead ends: 23549 [2021-06-05 13:54:51,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 286.4ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:54:51,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23549 states. [2021-06-05 13:54:52,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23549 to 21713. [2021-06-05 13:54:52,175 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 13:54:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21713 states to 21713 states and 55843 transitions. [2021-06-05 13:54:52,209 INFO L78 Accepts]: Start accepts. Automaton has 21713 states and 55843 transitions. Word has length 65 [2021-06-05 13:54:52,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:52,209 INFO L482 AbstractCegarLoop]: Abstraction has 21713 states and 55843 transitions. [2021-06-05 13:54:52,209 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 13:54:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 21713 states and 55843 transitions. [2021-06-05 13:54:52,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:52,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:52,229 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 13:54:52,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1450,670 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:52,444 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:52,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:52,444 INFO L82 PathProgramCache]: Analyzing trace with hash -353561421, now seen corresponding path program 415 times [2021-06-05 13:54:52,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:52,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081808737] [2021-06-05 13:54:52,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:52,527 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 13:54:52,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:52,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081808737] [2021-06-05 13:54:52,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081808737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:52,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482398005] [2021-06-05 13:54:52,528 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 13:54:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:52,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:54:52,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:52,650 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 13:54:52,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482398005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:52,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:52,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 13:54:52,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026851262] [2021-06-05 13:54:52,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:52,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:52,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:52,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:52,651 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 13:54:52,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:52,877 INFO L93 Difference]: Finished difference Result 26875 states and 64939 transitions. [2021-06-05 13:54:52,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:52,878 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 13:54:52,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:52,909 INFO L225 Difference]: With dead ends: 26875 [2021-06-05 13:54:52,909 INFO L226 Difference]: Without dead ends: 26857 [2021-06-05 13:54:52,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:54:52,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26857 states. [2021-06-05 13:54:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26857 to 21701. [2021-06-05 13:54:53,197 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 13:54:53,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21701 states to 21701 states and 55786 transitions. [2021-06-05 13:54:53,230 INFO L78 Accepts]: Start accepts. Automaton has 21701 states and 55786 transitions. Word has length 65 [2021-06-05 13:54:53,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:53,230 INFO L482 AbstractCegarLoop]: Abstraction has 21701 states and 55786 transitions. [2021-06-05 13:54:53,230 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 13:54:53,230 INFO L276 IsEmpty]: Start isEmpty. Operand 21701 states and 55786 transitions. [2021-06-05 13:54:53,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:53,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:53,245 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 13:54:53,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1451,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:53,445 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:53,445 INFO L82 PathProgramCache]: Analyzing trace with hash -858253880, now seen corresponding path program 416 times [2021-06-05 13:54:53,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:53,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379509490] [2021-06-05 13:54:53,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:53,555 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 13:54:53,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:53,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379509490] [2021-06-05 13:54:53,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379509490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:53,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29228855] [2021-06-05 13:54:53,556 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 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 13:54:53,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:53,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:53,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:54:53,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:53,683 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 13:54:53,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29228855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:53,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:53,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:54:53,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714896560] [2021-06-05 13:54:53,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:54:53,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:53,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:54:53,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:53,684 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 13:54:54,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:54,756 INFO L93 Difference]: Finished difference Result 26110 states and 65034 transitions. [2021-06-05 13:54:54,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 13:54:54,757 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 13:54:54,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:54,788 INFO L225 Difference]: With dead ends: 26110 [2021-06-05 13:54:54,788 INFO L226 Difference]: Without dead ends: 26056 [2021-06-05 13:54:54,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 334.1ms TimeCoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:54:54,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26056 states. [2021-06-05 13:54:55,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26056 to 22216. [2021-06-05 13:54:55,077 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 13:54:55,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22216 states to 22216 states and 57192 transitions. [2021-06-05 13:54:55,111 INFO L78 Accepts]: Start accepts. Automaton has 22216 states and 57192 transitions. Word has length 65 [2021-06-05 13:54:55,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:55,111 INFO L482 AbstractCegarLoop]: Abstraction has 22216 states and 57192 transitions. [2021-06-05 13:54:55,111 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 13:54:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 22216 states and 57192 transitions. [2021-06-05 13:54:55,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:55,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:55,126 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 13:54:55,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 672 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1454 [2021-06-05 13:54:55,326 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:55,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:55,326 INFO L82 PathProgramCache]: Analyzing trace with hash 674305229, now seen corresponding path program 417 times [2021-06-05 13:54:55,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:55,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182959873] [2021-06-05 13:54:55,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:55,418 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 13:54:55,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:55,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182959873] [2021-06-05 13:54:55,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182959873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:55,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428571971] [2021-06-05 13:54:55,418 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 13:54:55,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 13:54:55,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:55,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:54:55,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:55,548 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 13:54:55,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428571971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:55,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:55,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 13:54:55,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122355375] [2021-06-05 13:54:55,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:54:55,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:55,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:54:55,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:55,549 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 13:54:55,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:55,867 INFO L93 Difference]: Finished difference Result 27492 states and 66503 transitions. [2021-06-05 13:54:55,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:55,867 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 13:54:55,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:55,899 INFO L225 Difference]: With dead ends: 27492 [2021-06-05 13:54:55,900 INFO L226 Difference]: Without dead ends: 27468 [2021-06-05 13:54:55,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:54:55,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27468 states. [2021-06-05 13:54:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27468 to 22216. [2021-06-05 13:54:56,210 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 13:54:56,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22216 states to 22216 states and 57174 transitions. [2021-06-05 13:54:56,248 INFO L78 Accepts]: Start accepts. Automaton has 22216 states and 57174 transitions. Word has length 65 [2021-06-05 13:54:56,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:56,248 INFO L482 AbstractCegarLoop]: Abstraction has 22216 states and 57174 transitions. [2021-06-05 13:54:56,248 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 13:54:56,249 INFO L276 IsEmpty]: Start isEmpty. Operand 22216 states and 57174 transitions. [2021-06-05 13:54:56,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:56,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:56,265 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 13:54:56,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1455,673 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:56,465 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:56,465 INFO L82 PathProgramCache]: Analyzing trace with hash -703417346, now seen corresponding path program 418 times [2021-06-05 13:54:56,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:56,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956373481] [2021-06-05 13:54:56,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:56,591 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 13:54:56,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:56,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956373481] [2021-06-05 13:54:56,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956373481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:56,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144609971] [2021-06-05 13:54:56,591 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 13:54:56,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:56,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:56,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:54:56,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:56,719 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 13:54:56,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144609971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:56,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:56,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:54:56,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220200882] [2021-06-05 13:54:56,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:54:56,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:56,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:54:56,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:54:56,719 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 13:54:58,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:58,366 INFO L93 Difference]: Finished difference Result 31885 states and 78097 transitions. [2021-06-05 13:54:58,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 13:54:58,366 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 13:54:58,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:58,406 INFO L225 Difference]: With dead ends: 31885 [2021-06-05 13:54:58,406 INFO L226 Difference]: Without dead ends: 31717 [2021-06-05 13:54:58,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 682.7ms TimeCoverageRelationStatistics Valid=381, Invalid=3779, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 13:54:58,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31717 states. [2021-06-05 13:54:58,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31717 to 23319. [2021-06-05 13:54:58,756 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 13:54:58,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23319 states to 23319 states and 60082 transitions. [2021-06-05 13:54:58,799 INFO L78 Accepts]: Start accepts. Automaton has 23319 states and 60082 transitions. Word has length 65 [2021-06-05 13:54:58,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:58,799 INFO L482 AbstractCegarLoop]: Abstraction has 23319 states and 60082 transitions. [2021-06-05 13:54:58,799 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 13:54:58,799 INFO L276 IsEmpty]: Start isEmpty. Operand 23319 states and 60082 transitions. [2021-06-05 13:54:58,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:54:58,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:58,817 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 13:54:59,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 674 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1459 [2021-06-05 13:54:59,017 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:59,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:59,018 INFO L82 PathProgramCache]: Analyzing trace with hash -316814669, now seen corresponding path program 419 times [2021-06-05 13:54:59,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:59,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396100683] [2021-06-05 13:54:59,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:59,120 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 13:54:59,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:59,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396100683] [2021-06-05 13:54:59,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396100683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:59,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352085683] [2021-06-05 13:54:59,120 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 13:54:59,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 13:54:59,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:59,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:54:59,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:59,409 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 13:54:59,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352085683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:59,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:59,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 18 [2021-06-05 13:54:59,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467650852] [2021-06-05 13:54:59,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:54:59,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:59,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:54:59,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:54:59,409 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 13:54:59,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:59,733 INFO L93 Difference]: Finished difference Result 29012 states and 70223 transitions. [2021-06-05 13:54:59,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:54:59,733 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 13:54:59,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:59,769 INFO L225 Difference]: With dead ends: 29012 [2021-06-05 13:54:59,769 INFO L226 Difference]: Without dead ends: 28979 [2021-06-05 13:54:59,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 157.7ms TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:54:59,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28979 states. [2021-06-05 13:55:00,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28979 to 23319. [2021-06-05 13:55:00,105 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 13:55:00,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23319 states to 23319 states and 60073 transitions. [2021-06-05 13:55:00,147 INFO L78 Accepts]: Start accepts. Automaton has 23319 states and 60073 transitions. Word has length 65 [2021-06-05 13:55:00,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:00,147 INFO L482 AbstractCegarLoop]: Abstraction has 23319 states and 60073 transitions. [2021-06-05 13:55:00,148 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 13:55:00,148 INFO L276 IsEmpty]: Start isEmpty. Operand 23319 states and 60073 transitions. [2021-06-05 13:55:00,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:55:00,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:00,165 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 13:55:00,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1460,675 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:00,366 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:00,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:00,366 INFO L82 PathProgramCache]: Analyzing trace with hash -763108856, now seen corresponding path program 420 times [2021-06-05 13:55:00,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:00,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811371753] [2021-06-05 13:55:00,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:00,503 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 13:55:00,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:00,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811371753] [2021-06-05 13:55:00,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811371753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:00,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395026763] [2021-06-05 13:55:00,504 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 13:55:00,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 13:55:00,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:00,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 13:55:00,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:01,068 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 13:55:01,068 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 13:55:01,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:55:01,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:01,078 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 13:55:01,079 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 13:55:01,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:19 [2021-06-05 13:55:01,115 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 13:55:01,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395026763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:01,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:01,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 31 [2021-06-05 13:55:01,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28859723] [2021-06-05 13:55:01,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 13:55:01,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:01,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 13:55:01,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:55:01,116 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 13:55:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:08,336 INFO L93 Difference]: Finished difference Result 59239 states and 136732 transitions. [2021-06-05 13:55:08,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2021-06-05 13:55:08,337 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 13:55:08,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:08,421 INFO L225 Difference]: With dead ends: 59239 [2021-06-05 13:55:08,421 INFO L226 Difference]: Without dead ends: 58649 [2021-06-05 13:55:08,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25814 ImplicationChecksByTransitivity, 5068.2ms TimeCoverageRelationStatistics Valid=3924, Invalid=59328, Unknown=0, NotChecked=0, Total=63252 [2021-06-05 13:55:08,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58649 states. [2021-06-05 13:55:09,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58649 to 25834. [2021-06-05 13:55:09,067 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 13:55:09,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25834 states to 25834 states and 66847 transitions. [2021-06-05 13:55:09,116 INFO L78 Accepts]: Start accepts. Automaton has 25834 states and 66847 transitions. Word has length 65 [2021-06-05 13:55:09,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:09,116 INFO L482 AbstractCegarLoop]: Abstraction has 25834 states and 66847 transitions. [2021-06-05 13:55:09,116 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 13:55:09,116 INFO L276 IsEmpty]: Start isEmpty. Operand 25834 states and 66847 transitions. [2021-06-05 13:55:09,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:55:09,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:09,134 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 13:55:09,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1465 [2021-06-05 13:55:09,334 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:09,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:09,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1130464013, now seen corresponding path program 421 times [2021-06-05 13:55:09,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:09,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708242223] [2021-06-05 13:55:09,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:09,452 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 13:55:09,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:09,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708242223] [2021-06-05 13:55:09,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708242223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:09,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192312478] [2021-06-05 13:55:09,452 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 13:55:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:09,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:55:09,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:09,580 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 13:55:09,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192312478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:09,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:09,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 13:55:09,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336695162] [2021-06-05 13:55:09,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:55:09,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:09,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:55:09,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:55:09,581 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 13:55:09,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:09,894 INFO L93 Difference]: Finished difference Result 31663 states and 77216 transitions. [2021-06-05 13:55:09,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:55:09,895 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 13:55:09,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:09,936 INFO L225 Difference]: With dead ends: 31663 [2021-06-05 13:55:09,937 INFO L226 Difference]: Without dead ends: 31621 [2021-06-05 13:55:09,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:55:09,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31621 states. [2021-06-05 13:55:10,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31621 to 25834. [2021-06-05 13:55:10,335 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 13:55:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25834 states to 25834 states and 66838 transitions. [2021-06-05 13:55:10,378 INFO L78 Accepts]: Start accepts. Automaton has 25834 states and 66838 transitions. Word has length 65 [2021-06-05 13:55:10,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:10,378 INFO L482 AbstractCegarLoop]: Abstraction has 25834 states and 66838 transitions. [2021-06-05 13:55:10,378 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 13:55:10,378 INFO L276 IsEmpty]: Start isEmpty. Operand 25834 states and 66838 transitions. [2021-06-05 13:55:10,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:55:10,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:10,393 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 13:55:10,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 677 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1468 [2021-06-05 13:55:10,594 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:10,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:10,594 INFO L82 PathProgramCache]: Analyzing trace with hash -916422722, now seen corresponding path program 422 times [2021-06-05 13:55:10,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:10,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040284316] [2021-06-05 13:55:10,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:10,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:10,743 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 13:55:10,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:10,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040284316] [2021-06-05 13:55:10,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040284316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:10,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123206758] [2021-06-05 13:55:10,743 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 13:55:10,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:10,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:10,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:55:10,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:10,869 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 13:55:10,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123206758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:10,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:10,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 13:55:10,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016690380] [2021-06-05 13:55:10,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:55:10,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:10,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:55:10,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:10,870 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 13:55:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:15,235 INFO L93 Difference]: Finished difference Result 71126 states and 168440 transitions. [2021-06-05 13:55:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-06-05 13:55:15,235 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 13:55:15,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:15,334 INFO L225 Difference]: With dead ends: 71126 [2021-06-05 13:55:15,334 INFO L226 Difference]: Without dead ends: 69986 [2021-06-05 13:55:15,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15591 ImplicationChecksByTransitivity, 2937.8ms TimeCoverageRelationStatistics Valid=2433, Invalid=34623, Unknown=0, NotChecked=0, Total=37056 [2021-06-05 13:55:15,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69986 states. [2021-06-05 13:55:16,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69986 to 29289. [2021-06-05 13:55:16,062 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 13:55:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29289 states to 29289 states and 75764 transitions. [2021-06-05 13:55:16,118 INFO L78 Accepts]: Start accepts. Automaton has 29289 states and 75764 transitions. Word has length 65 [2021-06-05 13:55:16,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:16,118 INFO L482 AbstractCegarLoop]: Abstraction has 29289 states and 75764 transitions. [2021-06-05 13:55:16,119 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 13:55:16,119 INFO L276 IsEmpty]: Start isEmpty. Operand 29289 states and 75764 transitions. [2021-06-05 13:55:16,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:55:16,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:16,136 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 13:55:16,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1474 [2021-06-05 13:55:16,336 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:16,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:16,336 INFO L82 PathProgramCache]: Analyzing trace with hash -167005069, now seen corresponding path program 423 times [2021-06-05 13:55:16,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:16,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355160276] [2021-06-05 13:55:16,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:16,463 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 13:55:16,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:16,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355160276] [2021-06-05 13:55:16,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355160276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:16,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886131460] [2021-06-05 13:55:16,464 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 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 13:55:16,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 13:55:16,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:16,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:55:16,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:16,598 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 13:55:16,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886131460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:16,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:16,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 13:55:16,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312496646] [2021-06-05 13:55:16,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:55:16,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:16,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:55:16,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:16,599 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 13:55:16,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:16,942 INFO L93 Difference]: Finished difference Result 35769 states and 87381 transitions. [2021-06-05 13:55:16,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:55:16,943 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 13:55:16,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:16,991 INFO L225 Difference]: With dead ends: 35769 [2021-06-05 13:55:16,991 INFO L226 Difference]: Without dead ends: 35718 [2021-06-05 13:55:16,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 158.4ms TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:55:17,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35718 states. [2021-06-05 13:55:17,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35718 to 29289. [2021-06-05 13:55:17,457 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 13:55:17,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29289 states to 29289 states and 75755 transitions. [2021-06-05 13:55:17,508 INFO L78 Accepts]: Start accepts. Automaton has 29289 states and 75755 transitions. Word has length 65 [2021-06-05 13:55:17,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:17,508 INFO L482 AbstractCegarLoop]: Abstraction has 29289 states and 75755 transitions. [2021-06-05 13:55:17,508 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 13:55:17,508 INFO L276 IsEmpty]: Start isEmpty. Operand 29289 states and 75755 transitions. [2021-06-05 13:55:17,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 13:55:17,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:17,525 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 13:55:17,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 679 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1475 [2021-06-05 13:55:17,725 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:17,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:17,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1555398216, now seen corresponding path program 424 times [2021-06-05 13:55:17,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:17,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472836690] [2021-06-05 13:55:17,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:17,887 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 13:55:17,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:17,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472836690] [2021-06-05 13:55:17,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472836690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:17,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544597199] [2021-06-05 13:55:17,887 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 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 13:55:17,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:17,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:17,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:55:17,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:18,012 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 13:55:18,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544597199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:18,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:18,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 13:55:18,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946870197] [2021-06-05 13:55:18,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:55:18,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:18,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:55:18,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:55:18,013 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 13:55:25,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:25,855 INFO L93 Difference]: Finished difference Result 133248 states and 309294 transitions. [2021-06-05 13:55:25,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 321 states. [2021-06-05 13:55:25,855 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 13:55:25,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:26,064 INFO L225 Difference]: With dead ends: 133248 [2021-06-05 13:55:26,064 INFO L226 Difference]: Without dead ends: 129774 [2021-06-05 13:55:26,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46200 ImplicationChecksByTransitivity, 5887.5ms TimeCoverageRelationStatistics Valid=5835, Invalid=96885, Unknown=0, NotChecked=0, Total=102720 [2021-06-05 13:55:26,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129774 states. Received shutdown request... [2021-06-05 13:55:27,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129774 to 34615. [2021-06-05 13:55:27,558 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 13:55:27,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1482,680 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:27,761 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 13:55:27,763 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 13:55:27,765 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 13:55:27,765 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 01:55:27 BasicIcfg [2021-06-05 13:55:27,765 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 13:55:27,766 INFO L168 Benchmark]: Toolchain (without parser) took 855139.94 ms. Allocated memory was 352.3 MB in the beginning and 3.0 GB in the end (delta: 2.7 GB). Free memory was 331.8 MB in the beginning and 2.6 GB in the end (delta: -2.3 GB). Peak memory consumption was 1.2 GB. Max. memory is 16.0 GB. [2021-06-05 13:55:27,766 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 352.3 MB. Free memory was 333.0 MB in the beginning and 332.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:55:27,766 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.67 ms. Allocated memory is still 352.3 MB. Free memory was 331.8 MB in the beginning and 330.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:55:27,766 INFO L168 Benchmark]: Boogie Preprocessor took 11.31 ms. Allocated memory is still 352.3 MB. Free memory was 330.3 MB in the beginning and 329.3 MB in the end (delta: 998.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 13:55:27,766 INFO L168 Benchmark]: RCFGBuilder took 197.62 ms. Allocated memory is still 352.3 MB. Free memory was 329.3 MB in the beginning and 318.2 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 13:55:27,766 INFO L168 Benchmark]: TraceAbstraction took 854905.85 ms. Allocated memory was 352.3 MB in the beginning and 3.0 GB in the end (delta: 2.7 GB). Free memory was 317.8 MB in the beginning and 2.6 GB in the end (delta: -2.3 GB). Peak memory consumption was 1.2 GB. Max. memory is 16.0 GB. [2021-06-05 13:55:27,766 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 0.14 ms. Allocated memory is still 352.3 MB. Free memory was 333.0 MB in the beginning and 332.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.67 ms. Allocated memory is still 352.3 MB. Free memory was 331.8 MB in the beginning and 330.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.31 ms. Allocated memory is still 352.3 MB. Free memory was 330.3 MB in the beginning and 329.3 MB in the end (delta: 998.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 197.62 ms. Allocated memory is still 352.3 MB. Free memory was 329.3 MB in the beginning and 318.2 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 854905.85 ms. Allocated memory was 352.3 MB in the beginning and 3.0 GB in the end (delta: 2.7 GB). Free memory was 317.8 MB in the beginning and 2.6 GB in the end (delta: -2.3 GB). Peak memory consumption was 1.2 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 ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - 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 ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - 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: 854836.6ms, OverallIterations: 688, TraceHistogramMax: 10, EmptinessCheckTime: 5586.7ms, AutomataDifference: 432889.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 42770 SDtfs, 217738 SDslu, 293620 SDs, 0 SdLazy, 464911 SolverSat, 16485 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 176340.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53861 GetRequests, 35453 SyntacticMatches, 808 SemanticMatches, 17600 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657064 ImplicationChecksByTransitivity, 222562.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=29787occurred in iteration=665, InterpolantAutomatonStates: 17016, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 127383.7ms AutomataMinimizationTime, 688 MinimizatonAttempts, 2580623 StatesRemovedByMinimization, 684 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1962.7ms SsaConstructionTime, 10392.2ms SatisfiabilityAnalysisTime, 126814.7ms InterpolantComputationTime, 68908 NumberOfCodeBlocks, 68887 NumberOfCodeBlocksAsserted, 4614 NumberOfCheckSat, 67541 ConstructedInterpolants, 643 QuantifiedInterpolants, 522500 SizeOfPredicates, 1208 NumberOfNonLiveVariables, 79125 ConjunctsInSsa, 14765 ConjunctsInUnsatCore, 1367 InterpolantComputations, 11 PerfectInterpolantSequences, 58991/179279 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